Adjustable Restraining Cones, 2-PackCUSTOMIZE THE SIZE: Yardbirds Adjustable Restraining Cone is the only adjustable restraining cone available. Easily change back and forth from a medium size with a 3 bottom opening, to a large size with a 4 bottom openingaccommodating birds from 2 10 lbs. in size. RIDGED YET FLEXIBLE: Its unique flexible design helps hug the bird snugly on all sides, reducing the chance of birds backing themselves out of the restraining cone. EASY CLEAN: Cones can be