K38-20-160 is a medium density polyethylene copolymer containing an organic yellow pigment system, designed specifically for the extrusion of natural gas pipe. It exhibits excellent long term stress life and slow crack resistance. K38-20-160 is the North American equivalent to ELTEX TUB 172 Yellow produced by INEOS Olefins & Polymers Europe. This material is certified to CSA Standard B137.4-09 and is recognized by the Plastics Pipe Institute as having a PE 2708 and PE 80 rating. The natural version of this resin is available as K38-20-138.