The Westlake Pipe & Fittings 9817010 is a 1" Slip x Slip 45 Degree SCH80C Elbow. SCH 80 PVC Pipe is a polyethylene, thicker pipe. It is predominantly used in commercial or industrial applications. These applications are more demanding and need piping that will last in high pressures and harsh environments. It is a genuine Westlake Pipe & Fittings product.