Piston seal in this kit is intended for models with originaly leather seal, will not work with newer white nylon seal. (Newer white nylon seals are the same as for Slavia 630/631)

Piston seal is newly manufactured with high quality gasket materials specifically to fit older Slavia 620. Outer geometry is specifically designed to reduce friction while maximazing performence.

Kit contains 3 different o-rings that serve as breach seal. Since breach seal size changed multiple times during manufacturing years, this kit should cover all possible variants of Slavia 620 airguns.

Seals should be properly lubricated with gun oil and carefully installed.