Cylinder Tank Lockout For Maximum Padlock Shackle Diameter 13/50 in For Maximum Valve Stem Diameter 1 1/4 in For Valve Wheel Diameter 1 1/4 in Lockout Material Polystyrene Maximum Number of Padlocks 2 For Use With Valve Stem Lockout Color Red Maximum Temperature 350 Degrees F Minimum Temperature -50 Degrees F Outside Diameter 5.5 in Standards OSHA 1910.147