Air Line Regulator Lockout Max Number of Padlocks 1 Padlock Shackle Max Dia 9/32 In. Red Dimensions 1-1/3 in D x 1-1/2 in H Aluminum Fiberglass Reinforced Nylon Lockout Visibility No For Use With Intermediate SMC Models AR3000/NAR3000 Max Number of Devices 1 Includes Lockout Cap Hex Wrench Standards OSHA 1910.147