Baomain Mini Pneumatic Air Cylinder MAL 25 X 125 Single Male Thread Rod Dual Action 25mm(1 inch) Bore 125mm(5 inch) Stroke: Amazon.com: Industrial & Scientific
uxcell Small Air Pneumatic Cylinder MAL 25mm Bore 150mm Stroke: Industrial Air Cylinders: Amazon.com: Industrial & Scientific
How does a pneumatic cylinder work? Pneumatic cylinder design - YouTube