BAPL-4737 has a description of TSP1821 PUMP 5.5GPM 5100PSI 1450RPM 24MM

• SPECIFICATIONS - TSP1821
• Maximum Volume 5.5 gpm
• Max. Discharge Pressure 5000 psi
• Horsepower 19.0 EBHP
• Maximum Pump Speed 1450 rpm
• Maximum Inlet Pressure 125 psi
• Maximum Inlet Vacuum 3 ft. water (2.6 in Hg)
• Bore .708 in / 18 mm
• Stroke .826 in / 21 mm
• Crankcase Oil Capacity 31.0 oz
• Maximum Fluid Temperature 165°F
• Inlet Port Thread 1/2 BSP-F
• Discharge Port Thread 3/8 BSP-F
• Shaft Diameter .945 in. / 24 mm
• Weight 40.7 lbs. / 18.5 kg.
• Dimensions 13.8 x 9.8 x 7.7 in

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.