Vestil Heavy Duty Steel Machine Guard is among the strongest on the market. Stops a 12,000 lb. forklift traveling at eight mph in its tracks. Heavy duty pipe sleeved in durable HDPE plastic, where pipe post is 4" schedule 80 pipe, and pipe rail is 6" schedule 40 pipes. The standard color is safety yellow. The maintenance-free, never paint again the system will keep your facility looking clean and new. Units arrive fully assembled.