KayteeGravity Bin Feeder with Bracket to Attach to Small Animal Cage, Assorted Colours

Can someone tell me the dimensions of this Feeder please?

The bars on my cage run vertically, will this feeder be able to attach to them?

Anyone with rats that like to dig out and dump food, are the sides at the bottom opening high enough to keep that from happening?

Will this work with Lab blocks for rats?