Main function: Generally used as a safety valve; mainly for pressure overload protection. The surface of the pump head adopts wear-resistant phosphating process, which improves the surface hardness and has good wear resistance; it does not rust and has a beautiful appearance. The use of high-strength gears has high hardness, wear resistance and high machining accuracy. Using cyanide rubber, good sealing performance, no oil leakage, and long service life. The hardness can reach HRC40-45, and the high-precision centerless grinding is used to ensure the cylindricity of the shaft. Theoretical displacement (mL/r): 4.5 Output flow (L/min) 1500r/min: 6.7 1800r/min: 8.1 Working pressure (Mpa): 0.5 Maximum number of revolutions (rimin): 1800 Colour: as shown Material: metal Package Contents: 1 x TOP-13A Pump Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.