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Zinus

ZINUS 7 Inch Metal Smart Box Spring, Mattress Foundation, Strong Metal Frame, Easy Assembly, California King

  • Based on 18,080 reviews
Condition: New
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$133.37 Why this price?
4th of July Sale · 21% off was $169.00

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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jul 11
Order within 15 hours and 28 minutes
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Size: California King


Style Name: 7 inch


Design: Original


Features

  • THE LAST BOX SPRING YOULL EVER NEED - Unlike a traditional box spring, the Smart box spring is made of solid steel that comes together in no time and is backed by our ZINUS Peace of Mind 5 year warranty
  • DURABLY ENGINEERED - Durable steel is used to construct the inside framework of this foundation; twin size supports a maximum weight capacity of 350 lbs, while all other sizes can support up to 700 lbs
  • THOUGHTFULLY PACKAGED - All parts, tools and instructions are packed into one compact box that ships straight to your door
  • Box spring only, a bed frame or platform bed is required to support this foundation and is sold separately
  • Worry-free 5 year limited warranty included
  • This item arrives in one shipping box

Description

We like to think of a box spring as the backbone for your mattress. The best kind should be flat, level and built to keep your mattress in tiptop shape; and that’s just what the Smart Box Spring does! With its easily assembled, dependable steel structure, you can rest assured that your mattress will be sitting pretty. An included poly jacquard cover blends with the rest of your bedroom, and with a variety of different thicknesses to choose from, you can pick the one you need to customize the height of the bed. All packed in a compact shipping box with everything included, even our 5-year worry free warranty! Now that’s peace of mind you can sleep on.

Size: California King


Product Dimensions: 83"L x 71.5"W x 7"H


Special Feature: Durable


Color: Grey


Finish Type: Steel


Item Weight: 45 Pounds


Item Dimensions L x W x H: 83"L x 71.5"W x 7"H


Size: California King


Finish Type: Steel


Furniture Finish: Alloy Steel


Color: Grey


Style Name: 7 inch


Material Type: Steel, Fabric


Assembly Required: Yes


Global Trade Identification Number: 43


UPC: 841550100143


Manufacturer: Zinus


Included Components: Tools, Bed Frame, Instruction Manual


Brand Name: Zinus


Weight Supported: 700 Pounds


Compatible With Mattress Size: California king


Special Feature: Durable


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • SO EASY TO SET UP!!!
Size: Queen Style Name: 5 inch Design: New Quick Assembly
I am a 73-year old woman and I was worried that I would have to hire someone to set this up for me... NOT SO! The hardest part was getting the box upstairs. Once that was done it only took me 30 minutes to set this up. It was super easy, instructions were clear, and everything fit perfectly. This raised my mattress by 4". It is sturdy. The grey cover matches my bed frame. Absolutely great product. ... show more
Reviewed in the United States on October 14, 2024 by JMM
    • Did not come with instructions
Size: Queen Style Name: 7 inch Design: Original
Although mine did not come with instructions, it was pretty self explanatory. It does not look the best and is okay quality. Serves its purpose. Mine had extra parts. It is not very versatile. Easy to move and assemble.
Reviewed in the United States on September 9, 2024 by Amanda
    • Brilliant!
Size: Twin Style Name: 7 inch Design: New Quick Assembly
Brilliant! Excellent way to buy a sturdy, easy to put together “box spring” (5 mins)!
Reviewed in the United States on September 19, 2024 by Shill
    • Good for guest bed
Size: Full Style Name: 7 inch Design: New Quick Assembly
Easy to assemble except two pieces were missing. I tried to call the company for replacement but they wanted pictures, etc. instead I returned (very heavy) and was sent a new on. Good height, heavy duty, no squeeking and good price.
Reviewed in the United States on May 3, 2024 by Tina N. Erlenbeck
    • Very nice
Size: Full Style Name: 5 inch Design: New Quick Assembly
It arrived on time. It took less than 15 minutes to put together and woks perfectly
Reviewed in the United States on October 11, 2024 by allison collins
    • Sturdy metal box frame
Size: Twin Style Name: 7 inch Design: Original
I recently ordered this frame for my son’s new bed. I arrived with no damage and well packaged. It does require some assembly with an Allen wrench, some bolts, and washers; however the directions are self explanatory enough and I was able to assemble it within 15 minutes. It also conveniently comes with a torque wrench for the bolts which made it a lot easier versus using the metal allen key. It also comes with extra bolts and washers in case you misplace some. The height was also perfect at the exact 7” I needed. All in all, a great purchase. ... show more
Reviewed in the United States on July 25, 2024 by Brooke C.
    • Easy Assembly, Highly Recommend
Size: King Style Name: 7 inch Design: New Quick Assembly
I was impressed enough with this box spring to come and write a review the day after I assembled it. I was concerned because prior to purchasing, Amazon flagged this item as one with frequent returns. Thankfully, I went ahead and ordered it based on the good reviews I had read. It is awesome! I live in a two-story townhouse, and this box spring allowed me to set up a king bed in my bedroom! It was super easy to carry the box up the stairs. The instructions were very clear on what parts went where, and even with my very limited carpentry skills, it was super easy to put together. It took 14 screws total and even came with an Allen wrench and a ratchet for easy assembly. All the different pieces were zip-tied together, so it was easy to tell which pieces were the same & what kind they were. Overall, I would definitely highly recommend this box spring for anyone; I honestly think they could charge more for the quality, but I am thankful that they did not because as a student, I really could not afford other options. 10/10 cannot recommend enough! ... show more
Reviewed in the United States on August 4, 2024 by Madeline Franz
    • All HW and Tools.. were definitely NOT included
Size: Queen Style Name: 7 inch Design: Original
Review Image by J. S. J. S.
Review Image by J. S. J. S.
Zinus was a complete failure today. I have bought 2 of their mattresses and we love them. This product unfortunately didn't arrive with any parts and the Zinus Customer Service who was not much of a help in getting me the replacement HW quickly. I am surprised that they haven't made provision for this type of situation since I am sure it happens reqularly. Ok - so here's Part 2 of this review. I wish there is a ZERO star. So not sure who did the QA for this one box that I received but in the words of my kids - this was an EPIC fail. To continue this saga, when the box arrived, much to my dismay, the hardware was not included. So while zinus support was of ZERO help - despite this being a frequent occurance with their box springs (just search the comments and you can check), Amazon shipped me a 2nd order of box spring which arrived today - 3 days after the 1st one. So I was all set to just put it all together coz now I have all the screws and boths. Ummmm.. can you tell the difference between the 2 pictures ?? It appears Zinus folks, forgot to make the 2 holes they needed to make on the piece. So now, i had to dive back into the box (of course I had taped it back up to go back to Amaraon) that arrived today, and along with the hardwar pouch, had to go and find the piece and make sure it has the 2 holes. Who forgets parts these days ? I mean are you using your aunts and uncles to do QC Zinus ? I thought most manufacturers used those new fangled things called 'computers' to make sure the correct Bill of Material is INCLUDED with the box, before it is sealed ?? You guys make a good foam mattress and that's just 1 item.. and i thisnk you should stick with just 1 item to pack. Anytime it semms more than 1 item, like this boxspring - you guys just can't do it. Not a biggie - we should alll do what we are good at. ... show more
Reviewed in the United States on August 16, 2022 by J. S. J. S.

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