Stainless steel cylinder set for gearbox v. 2 and V.3 from SHS (ref. Super Shooter). The entire part is made from one piece of metal by CNC! The cylinder head is an integral part of the polished roller, so there can be no leakage of air or mutual misalignment, as in conventional heads with o-rings. SHS cylinders have no other post-applied layer, in which is a danger of undesired and uneven coating or abrasions. We recommend to use this with the right piston head and nozzle from SHS, which ensures it achieves the best possible results of tightness. Unbeatable price/performance ratio.