Airpot Corp. manufactures four basic families of pneumatic actuators, Airpel Anti-Stiction cylinders, Airpel Plus, Airpel-AB air bearing cylinders, and Airpot Self- Aligning Actuators. All employ our unique combination of a borosilicate glass cylinder and either a graphite or specially shaped stainless steel piston and have outstanding performance properties with respect to friction, cleanliness, and temperature range. The major differences are in the level of friction, actuation direction capabilities, outer construction, mounting features, and dimensions.