SMC Push-in System Nylon/Polyurethane Tube and Accessories SMC Nylon/Polurethane Tubing is suitable for general industrial water applications, and may be suitable for the transport of a number of other fluids as specified by SMC (consult with SMC for details). A variety of tube types are available, in nylon or polyurethane. Flame resistant double-layer "TRB" series tubing offers additional protection in environments where sparks may present a challenge, such as machining areas, or where welding operations take place. 4mm to 12mm diameter High burst pressure characteristics Available in different colours