1pc Hay Feeder, 2 in 1 Food and Hay Feeder Rack for Rabbit, Guinea Pig and Other Small Animals (Blueyellowpink) SIZE: 6.1 x 5.9 x 7.2 inches / 15.5 x 15 x 18.3 cm. The bowl back lock hole diameter approx 0.43 inch. weight330g*1. HAY FEEDER: This hay feeder can be used both as food feeding bowl and hay rack. The middle is plastic pressed against the hay, which minimizes waste. STURDY & DURABLE: The hay feeder is made of hard plastic and is durable. The metal encapsulation design on the front can effectively prevent animal bites. CROSS LOCK FIXED DESIGN: The back of the hay feeder is a cross lock fixed design. It is convenient to fix the shelf on the grass cage and adjust the height. colorblueyellowpink. pack*1.