1/2" Ports 1:1 RatioDiaphragm Pump 50/50 Mixing of Antifreeze & Water 1:1 Ratio Diaphragm Pump Solvents Transfer 1:1 Ratio2" Diameter Air Motor Piston Pump Calcium Chloride Tire Fill 1:1 Ratio Diaphragm Pump Wash Pump 10:1 Ratio 4-1/4” Air Motor Piston Pump