The Tri-Light Isolation Plug allows you to quickly isolate open pipe ends while performing hot work. The Triple Seal design creates three separate contact points while sealing against the pipe wall affording your pipe crew a considerably safer work environment. Tri-Light plugs are constructed of strong light weight aluminum sheet with neoprene seals and can be easily installed by one man. The 16" plug size weighs less than 65 Lbs (29.5kg).