The V-Safe valve cover lockout system helps you to properly lockout valve handles from 1" up to 14" diameter. Valve cover lockouts are designed with two flattened half moons that completely cover the valve wheel. Made from polypropylene plastic, the V-Safe lockout unit is fully dielectric, resistant to extreme temperature changes (-50F to 360F) and resistant to cracking and abrasion. Available in 4 colors: red, yellow, blue and green (specify color when ordering). Color choices are in compliance with those recommended in ANSI Z353.1.