Mainstays Cube Storage H Inserts, Set of 2, Warm Walnut, for Mainstays 11 in Cube Storage Organizers
Mainstays Cube Storage H Inserts, Set of 2, Warm Walnut, for Mainstays 11 in Cube Storage Organizers
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Mainstays Cube Storage H Inserts, Set of 2, Warm Walnut, for Mainstays 11 in Cube Storage Organizers

|141 ratings

Key item features

  • Storage Integration: Designed for Mainstays 11-inch Cube Storage Organizers, these inserts enhance existing units by dividing one cube into two separate compartments.
  • Compartment Dimensions: Each insert measures 11.02 in W x 11.65 in D x 11.02 in H, creating two internal compartments, each 10.25 in W x 11.65 in D x 5.25 in H.
  • Versatile Placement: Can be positioned either vertically or horizontally, offering flexible organization to sort smaller items and maximize space utilization.
  • Sturdy Construction: Made from particle board, each insert weighs 7.04 pounds and supports up to 4.4 pounds, featuring a Warm Walnut finish for coordination.
  • Required Assembly: Assembly is necessary; hardware is included, but a Phillips head screwdriver is required. The surface can be wiped clean with a soft, dry cloth.
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3.9 out of 5 stars
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141 ratings29 reviews
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Showing 1-3 of 29 reviews

May 23, 2025
Reviewer name: Mickey
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Built to Last!

The Mainstays 11" Cube Storage H Inserts in black are a great way to add some structure to your storage cubes. They were easy to slide in and instantly made organizing my shelves way easier. The black color looks sleek and goes with everything. Super practical and a nice upgrade for any cube organizer!

Incentivized Review
Review from Field Agent
Helpful?2NCVQYFCI8N513951014886
May 24, 2025
Reviewer name: SiestaMom
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Love the extra shelving this provides!

These are great for adding additional shelving for your cube storage. If you've put together furniture before, then you won't have any trouble at all putting these together. I was able to do it without even looking at the directions. I love that it gives me additional shelving for shoes so that the shoes aren't sitting on top of each other. They fit in perfectly.

Incentivized Review
Review from Field Agent
Helpful?2NCVQYFCI8N513951014886
Mar 31, 2026
Reviewer name: Lazerwonder
Item details
Color: Warm Walnut
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I didn't find the images misleading. As I have purchased many cube shelves, i knew there was no way the price was ffor a whole shelf. it was just the insert. Anyways, I saw the insert idea on IKEA but of course, their inserts would fit their brand which is too big for the MainStay (Walmart) brand. So i did a little searching and I am so glad I stumbled across these! Although they were sold out in my desired color, it was not a big deal. I used the insert for the shelf that I have convertef into my toddler's dresser. Now the shelf fits a small drawer of socks and a small drawer of shoes. Another cube was split for accessories and puzzles. It worked so great that zi ordered another set of two for another cube shelf. it is so easy to assemble -- no issue with splitting the wood! My toddler helped me screwed the shelf together too. it was fun for them to help mommy. :)

Helpful?2NCVQYFCI8N513951014886
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