Pneumatic Fitting Lockout, Max. Number of Padlocks 6, Padlock Shackle Max. Dia. 9/32 in, Red, Dimensions 2-7/8 in D x 2-7/8 in H, Isoplast Polymers, Fitting Type Male, Valve Size 1/4 in, 3/8 in, 1/2 in, Lockout Visibility No, For Use With 1/4, 3/8, and 1/2 in Male Fittings, Max. Number of Devices 1, Includes Hole in center of device allows for permanent storage on an air hose and a loop on the side can be used to hang the hose and lockout device., Standards OSHA 1910.147, Package Quantity 6