ProClassic Crimp - On hose ends make custom hose fabrication easy. Simply cut the hose, push together the hose and fitting and crimp Their lightweight collar design is engineered by size for precise compression ensuring proper end attachment with Russell manual crimper and appropriate crimper die. Replacement collars are available in the event you want to re - use the hose end on a different assembly. They are available in - 4 through - 12 sizes and are packaged complete with collar. Crimper and dies sold separately.