Feature: 1. The pump head has a flow rate of 1.5 ml per turn, and the recommended speed is less than 400 rpm (short working time and sufficient heat dissipation, and the maximum speed can be designed to 500 rpm if necessary). 2. The pump cover is fixed by hand twisting screws, easy to disassemble and install, and quickly replace the pump tube. 3. Pump tube guide groove to prevent damage to the pump tube. 4. The wheel frame adopts ball bearings, which is silent and has a long service life. 5. 42 stepper motor is about 30W power, energy saving and environmental protection. Specification: Item Type: Step Motor Peristaltic Pump Model: G928SM (stepper motor right angle) Motor Type: 42 stepper motor Pump Head: Roller peristaltic pump Pump Cover: Transparent PC Number Of Rollers: 3 rotor rollers Roller Bracket: 304 stainless steel Installation Method: Right angle Flow Range: 0-400ml / Min (pump Tube: Inner diameter 6.4mm outer diameter 9.6mm) Standard Pump Tube: Food grade platinum vulcanized silicone tube Pump Tube Size: Approx. 6.4 x 9.6mm / 0.3 x 0.4in Pump Head Flow Per Turn: 1.5 ml, recommended speed is less than 400 rpm (short working time, sufficient heat dissipation, maximum speed can be designed to 500 rpm if necessary) Motor Power: 42 stepper motor about 30W. Package List: 1 x Peristaltic Pump 1 x Hex Wrench