Gas Cylinder Lockout For Maximum Padlock Shackle Diameter 1/4 in For Neck Ring Diameter 3 1/2 in For Pressure Type High Low For Thread Type 11 UNF Lockout Material Polypropylene Maximum Number of Padlocks 1 Includes Lockout Device Lockout Color Red Overall Height 6.25 in Overall Width 3.48 in Standards OSHA 1910.147