This is a new hook on design its a great little addition to your rabbit /guinea pig cage its barrel shaped to make it easy for your pet to get the hay .its easy to fill by pushing the hay through the wide opening on the top.
Can be hooked at whatever height you require with the hooks provided
 
The size of the barrel is 12" long x 6" deep x 5" high. Plenty of room for lots of hay.
 
The materials used are plywood and softwood