CAST IRON PUMP W/10 GROOVE BELT ARRANGED FOR DIRECT MOUNTING TO 1-3/4'' 20-SPLINE QUICK COUPLER PTO SHAFT. RATED @ 100psi.The High Performance Pump. 100 PSI at 40 GPM due to increased pulley ratio and larger 1-1/2'' x 1-1/4'' construction. Provides higher pressure and greater volume for applications with large tanks and long spray booms. Allows fuel savings by operating at lower engine speeds while maintaining adequate spraying pressures