BAPL-3149 has a description of P218RX 3.4GPM 2000PSI 1750RPM 24mm SHAFT

• Maximum Flow: 4.1 GPM
• Maximum Pressure: 2200 PSI
• Maximum Pump Speed: 3450 RPM
• Minimum Horsepower Requirements: 6.0 bhp (7.8 hp for gas engines)
• Shaft Diameter: 24mm
• Plunger Diameter: 20mm
• Stroke: 16mm
• 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.