Bought 2 sets to build a pet cage / add a inside run to my ferplast pet cage for my rabbit.  Great product and delivered extremley fast.  Some of the connectors I am having trouble fitting - just taking a bit of man power so needing to get my boyfriend on the case!  I think I'm going to find I need more connectors - it would be helpful if they sold these separtley.  Best price I could find online, but I believe these used to be a lot cheaper years ago.