PRINZING 45345 BIG patented design and ultra-tough polypropylene material make these devices the best choice to assuredly lock out your ball valves. Large Ball Valve Lockout Device locks out pipes 2 in. to 8 in. in diameter Ultra-tough polypropylene resists temperatures from 0? to 175?F (- 18? to 79?C) Equipping your employees with the proper lockout tools and warning devices can save lives, reduce lost employee time, and cut insurance costs. Brady? is a world leader in lockout/tag out products and services offering industry expertise and a broad range of durable, easy-touse lockout devices.