BAPL-4467 has a description of 280 PUMP 3.0GPM 1000PSI 133ORPM 16.5mm

• Inlet Pressure Range.....................–8.5 to 40 psi (–0.6 to + 2.8 bar)
• Bore...........................................................0.787” (20 mm)
• Crankcase Capacity...................................10 oz. (.3 l)
• Maximum Liquid Temperature...................160°F (71°C)
• Above 130°F call CAT PUMPS for inlet conditions and elastomer recommendations.
• Inlet Port (1).........................................1/2” NPTF (1/2” NPTF)
• Chemical Injection Port (1)..................1/4” NPTF (1/4” NPTF)
• Discharge Ports (2)..............................3/8” NPTF (3/8” NPTF)
• Discharge Port (1)................................1/2” NPTF (1/2” NPTF)
• Pulley Mounting...................................Either side (Either side)
• Shaft Diameters.........................................0.650” (16.5 mm)
• Dimensions (280).................10.63 x 8.79 x 5.30” (270 x 223 x 134.5 mm)
• Dimensions (290).................10.83 x 8.79 x 5.30” (275 x 223x 134.5 mm)
• Flow................................................3.0 gpm (11.4 l/m)
• Pressure Range..................100 to 1000 psi (7 to 70 bar)
• RPM.............................................1330 rpm (1330 rpm)
• Stroke...............................................0.394” (10 mm)
• Weight...........................................11.7 lbs. (5.3 kg)

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.