Skey products offers a pneumatic pump for oil and grease. The direction of the air is reversed by a solenoid valve and the piston of the pump moves forward and backward. During reverse stroke the grease/oil from the acrylic reservoir is sucked and forced out during forward stroke. The operation can be controlled by a timer or manually. The discharge is varied by changing the stroke length of the cylinder. These are available in three different models having 1.5 ltr and 5 ltr reservoir capacity and maximum discharge per of 6 cc/stroke, 30 cc/stroke, 60 cc/stroke. Maximum discharge pressure of 180 kg/cm2 is available.