BAPL-3153 has a description of P316RX 3.9GPM 3000PSI 1450RPM 24mm SHAFT

• Maximum Flow: 4.7 GPM
• Maximum Pressure: 3000 PSI
• Maximum Pump Speed: 1750 RPM
• Minimum Horsepower Requirements: 9.7 bhp (14.6 hp for gas engines)
• Right handed shaft with short backend
• Shaft Diameter: 24mm
• Plunger Diameter: 18mm
• Stroke: 14.1mm
• Maximum Temperature: 160 Degrees F.
• Inlet Ports: Dual 1/2" BSP
• Discharge Ports: Dual 3/8" BSP
• Weight: 16 lbs

WARNING This product can expose you to chemicals, including Lead which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.  As alarming as the proposition 65 warnings may appear, you can rest assured that the products we sell remain the same as in the past. We encourage normal hygiene and discourage placing any of our products in your mouth, as they are not intended for human consumption.