Gas Cylinder Lockout For Maximum Padlock Shackle Diameter 17/50 in For Maximum Valve Stem Diameter 1 1/2 in For Valve Wheel Diameter 3 1/2 in Lockout Material Polypropylene Maximum Number of Padlocks 1 For Use With Neck Rings to 3-1/2 in Dia Includes (1) Lockout Device Lockout Color Red Maximum Temperature 176 Degrees F Minimum Temperature -4 Degrees F Outside Diameter 3.47 in Overall Height 6.25 in Resistance Properties Chemical Resistant