sim graco grease pump, 1. air operated grease pump, electric grease pump, AC220,380V, DC24, 12V 2. 50:1, 65:1 etc 3. gun sim graco grease pump.air operated grease pump, oil pump* air inlet pressure ... at high pressure* Cast aluminium pump body* Compatible with integrated lubrication system* Compatible with different sizes of grease drum in the market