Whip check safety cables is used on all blast hose and air hose connections to reduce the danger caused by hose coupling failure. Safety cables are available from Blastline in two sizes: (1/8 dia – 20 1/4 length, 1/4 dia – 38 1/4 length) Designed for 1/2″ to 1 1/4″ OD hose and for 1 1/2 to 3″ OD hose.