pneumatic seals without friction

[albertos]

Hello everyone
you know how to point out the anodised aluminium anodised cylinder stem seals.
I know that there are no sealing cylinders I think smc to not make names, you know how they are made? Are they unplayable combinations with twists and wrinkles? I have to eliminate as much as possible the problem of stck slip.

 

[fabryh]

also on the smc cylinders there are seals. ..but are specific for low friction therefore made in a different material.
for the inside instead there are in addition to the always specific piston gaskets also fat on purpose (expensive parecchio)

tolerances are the same as the standard but the surface finish of the various components (inside shirt and external stem, usually in chromed c45)