●ADVANCED DESIGN This product is designed without tensioners and is easy to disassemble, clean and maintain after prolonged use. ●Selection of flow direction: this product allows autonomous selection of flow direction, you can control the direction of the flow via positive and negative connections. ●CW and CCW: switch the positive and negative poles of the power supply, realize the CW and CCW of the pump head ●Advanced Material The pump body is made of stainless steel rollers and screws made of stainless steel, which will not rust during prolonged penetration into the water. ●Application: widely used in experiments, biochemical analysis, pharmaceuticals, fine chemicals, biotechnology