Our Uniscrew caps protect the screw heads from shocks and dirt and at the same time gives the heads a nice finish. It accepts a wide variety of screw sizes, which reduces stocks as well as assembly times thanks to its integrated washer. The manufacturing material is a copolymer PP (polypropylene) with a very high resistance to impacts resistant even at temperatures of -20ºC . It contains also a UVA additive to prevent degradation as a result of sunlight and bad weather.