Plastic chain or P chain, The ANSI standard consists of a polyacetal chain link and a SUS304 stainless steel pin, coupled with a standard roller chain sprocket. The top of the ANSI standard P chain is plain for conveyance based on the roller chain power transmission. The use of engineering plastics with stainless steel. This allows this type of chain to operate without lubrication for special environments. We have a special type of plastic which is made to order. (conductive model chain chemical protection and heat resistant), the operating temperature range is -20°C to +80°C.