The ZETA-PP 42 VAGr3/4 is a low-pressure 3-cylinder diaphragm pump featuring an anodized aluminum body, polypropylene heads and manifolds, and stainless steel valves. All models come with a standard control valve and pressure gauge. This model is designed with gear reduction for a 3/4" shaft gas engine (4-6.5 HP) and weighs 31.3 lbs.