Made of heavy duty, long lasting plastic -ideal for handling, holding or shipping quail. Raised top corner fits bottom for stacking several high with solid bottom to protect lower birds, has positive spring latch. When released birds, side door slides open to let birds walk out without excitement. Low 4 1/2" Headroom helps eliminate bruised birds, as they do not have enough room to jump up and hit the top. Out side Dimensions 27" x 18" x 6 1/2".