The Master Lock No. S3080 Adjustable Ball Valve Lockout features durable, lightweight Zenex™ Thermoplastic material to withstand chemicals and extreme temperatures. Device is easy to use and prevents accidental activation of a closed ball valve. The adjustable design fits valves from 1/2 inch up to 2 inches (13mm to 51mm). Four locking holes accept American Lock® and Master Lock® safety padlocks.