Air Cylinders Pneumatic Cylinders Hydraulic Cylinders Valves Pumps Allenair is the Leading Provider of Hydraulic Cylinders, Air Cylinders, Pneumatic Cylinders that are Interchangeable and we also Carry Valves, Pumps and so Much More. Pneumatic Timers, Solid State Electronic Timer. LED. Electrical Override. Single Connection Operates Timer & Solenoid. Adjustments. Auxiliary Output Standard. Optional Remote Potentiometer. Single-Timer. Dual-Timer. 10 Basic Models. Custom & Special Designs ...