Take my word for it. If you are getting Dragon Ledges for a enclosure you already have take the advice on the video on how to install them and do the install BEFORE you put your cage together! Especially if you are DIY retrofitting a full screen enclosure to a hybrid. Had to do a lot of disassembling and reassembling to put the ledges on. Absolutely NOT the fault of Dragon Strand! My fault for being impatient!