Piston seal be suitable for VW series.
The seal is fit onto a shaft with the sealing lip contacting the housing bore. V-rings are considered external lip seals. Symmetric seals are symmetrical and works equally well as a rod or a piston seal. An axial seal seals axially against a housing or machine component. Sealing direction pertains primarily to hydraulic and pneumatic seals that are used in applications with axial motion, such as cylinders and pistons.