Fits nice and snug on either shelf of Kohler Draft shelf.

I recently renovated my bathroom and bought the 18" towel bar frame along with a 12" tray and the 6" container. I bought them more for storage shelving than a towel bar. This set looks amazing! The tray/container has a glossy finish, which is what I wanted, and the bottoms are rubber with a rim around the edge so that it sits inside the towel bar frame. Be aware that on the bottom shelf, you cannot fit the trays/container the full width of the frame due to the vertical legs of the frame against the wall. On the top shelf, you can fit the full width. I like using the empty frame part to hang a hand towel. I will put small items in the container like hair ties, etc. This set looks so awesome and is so useful! I love them all!