Advantek Small Animal Hutch Frame Kit, 24-Inch

Makes it nice to stack cages but is a pain in the butt too put on the cages.

Grey cage legs. But side bars need to be reinforced if you want to use litter.

Built my own rabbit hutches and these work great. The pieces that the trays rest on are a little flimsy, but they work.

I purchased one of these to go with a 24" Advantek cage. It works well. I only have one very minor complaint. The spacing of the slots for the rails that hold the pan are too close together. This means that the spacing of the vertical pieces are about 2" too close together. Instead of the vertical pieces being aligned with the edges of the cage, one set of the vertical pieces has to be in one column. If you are using this for one cage, or using this with other fame kits of the same brand - this isn't such a big deal. it looks a little funny, but it works just fine.However, when I went to repurchase more of these off of Amazon they were unavailable. So I purchased a different brand. And they don't fit together because the other brand has the rail slots further apart. I purchased one of these and three of the other brand, so I'll be having to purchase another of the other brand to replace this one. This isn't entirely the fault of this product - I shouldn't have assumed that different brands would work together. But they are almost identical except for that one problem.This framing kit would have worked for the other brand cages - any 24" cage would work fine. Just make sure that if you're stacking them, to purchase all of the same brand framing kit.