Airpot small bore air cylinders use ambient air to precisely and accurately control the force, velocity and impact of motion. Our dashpots are available in 6 bore diameters including .22, .366, .627, .945, 1.281, and 1.75 inches. https://www.airpot.com/product-category/product-lines/pneumatic-actuation/airpel-plus-air-cylinders/