... and rigidity 3. Good dielectric properties Black Plastic Acetal Machining Product Name: POM (Polyoxymethylene, acetal, Delrin)Colors Include:-Natural (white), Black, other ... ♦ Machinery industry used to produce gears, springs, bearings, wheels, connecting rod, impeller blades etc..♦ Automobile industry♦ Electronic and electrical appliances♦ Others ...