We offer several hydraulic pumps suitable for the Model 32 Bender. However, any power unit may be used that has an output of at least 1500-4000 PSI. The average bending pressure will generally be below 1300 PSI. Tested examples: 1 3/4" x .095" mild steel - 900 PSI, 1 5/8" x .083" 4130 chromemoly - 1400 PSI, 1 1/2" solid round bar stock - 3100 PSI.