We are offering piston seals - das. we are one of the leading and prominent manufacturers and suppliers of the das seal, which is a compact piston seal made of high quality raw material. our extensive array consists of on nbr ring with 3 sealing lips in the middle, 2 polyester backup rings and extensively used for reducing the large gap between the machined walls of the high pressure systems. Furthermore, the das seal also consist of 2 pom rings as guiding elements. material: pom, nitrile (nbr)