Virtually indestructible valve covers. Once locked, they rotate freely around the hand wheel & prevent the valve wheel from being turned. The strong polyurethane plastics make them resistant to cracking and abrasion. They are resistant to extreme weather and temperature conditions. Available in 5 sizes ( Red colour ) Other colours are available on request (minimum quantity applicable). Padlock holes are available in each gate valve lockout device. Withstands temperatures from - 20°F to 200°F. Unique knockout center accommodates OS & Y or "rising stem" valves. Hasps and padlocks can be used to lock these lockouts.