Modified LEGO Pneumatic Cylinder - V2 2x11 - Extra Large - 19467c01 – Green Gecko Workshop
Pneumatic Cylinder Disassembly & Lubrication Findings - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Lego Technic New 2015 Pneumatics Test & Comparison - YouTube
Build 19 Piece Pneumatic Kits with Technik Parts Contains Air Pump, Piston Pressure Rod, Cylinder,Pneumatic Hose &More,Great for DIY, MOC Tech, Compatible with Lego