Acetron® Polyoxymethylene POM-H / Ertacetal® H Polyoxymethylene POM-H is a homopolymer acetal grade that offers superior mechanical strength, stiffness, hardness, and creep resistance, in addition to a much lower thermal expansion rate and increased wear resistance when compared to copolymer acetal grades. Due to these characteristics, Acetron® POM-H / Ertacetal® H POM-H excel in a variety of applications including small diameter, thin-walled bushings and bearings, gears, electrical components, valves, and fluid handling components.