Inner Cylinder head O-Ring made of Viton (FKM). In our opinion, Viton is...
Tygon F-4040-A hose, inner diameter 4,8mm (3/16")
Counter Shaft Sprocket from Afam. #415 (14-18 teeth)
Outer Cylinder Head O-Ring made of Nitrile (NBR)
Piston ring for Wössner forged...