I would avoid them as mentioned, enclosed circle doors are bad for snakes. If your snakes are anything like mine, they love to double back on themselves in doorways of hides so you want a semi circle. Check out Reptile Basic hides. Those are what I use and they come in different sizes, have a flat top so can double as perch and are easy to clean. The only downside I found so far is they do warp with heat but my snakes seem to care less about that.