Semi-hydraulic three-diaphragm pump, recommended for boom spraying and liquid fertilization. Oil bath crank mechanisms with inspectable oil reservoir. Nuts and bolts with Geomet protective treatment. Nitrile rubber diaphragms as standard, Viton®, Desmopan® or HPDS® diaphragms available upon request. All parts in contact with spraying liquids are polypropylene and stainless steel. C with 1"3/8 splined shaft.