E.MC pneumatics & hydraulics M series mechanical valves are controlled by hand or other mechanical force for different conditions, including 1 series 2/2 way valves, 2 series of 3/2 way valves and 1 series of 5/2 way valves. There’re at least 6 standard button head styles for you to choose, the Button with arrow mark with braket, Chain wheel, Button with "Reset" mark with braket, Concave button with braket, Flat button with braket, Big head button……the M series mechanical valves are widly used in different pneumatic system.