The Master Lock® No. S3068 seal Tight™ Handle-On ball valve lockout features durable aluminum & steel construction to defy corrosive environments and extreme temperatures. The patent pending lightweight and compact device is designed to clamp tight on handle stop to prevent handle movement. It can be applied to 1/4in (6mm) to 4in (102mm) sized valves and works on insulated pipes and in close quarters. Master Lock® Ball Valve Lockout, Handle-On, Series: Seal Tight™, 1/4 in Fits Minimum Handle Size, 4 in Fits Maximum Handle Size, 1 Padlocks Maximum, 9/32 in Padlock Shackle Maximum Diameter, Aluminum/Steel, Black/Red, -70 °F Minimum Temperature, 350 °F Maximum