1502XL Silver Cast 5 Roller Pump. Hypro pumps are available in cast iron, Ni-resist, or the super corrosion resistant Silver Series XL models. Shafts are stainless steel and bearings are factory lubricated - so no greasing is required. The Silver Series models are especially designed for use with highly corrosive herbicides. Tests results indicate they can last up to 10 times longer than cast iron models and three times longer than Ni-resist. Max flow 33.1 gpm at 540 RPM, 62.1 gpm at 1000 RPM Max Pressure 150 PSI Max Speed 1000 rpm Shaft size 15/16'' solid Port size 1-1/2'' Pump shaft rotation CCW Rollers Super rollers standard Seals: Buna-N seals standard