[ USER FRIENDLY DESIGN] The removable cover enables manual of the positioning bead, offering flexibility in tubing setup while maintaining optimal pumping efficiency for hobbyists and educators [ DURABILITY CONSTRUCTION] Built with a combination of and metal components, pumps delivers reliabled under DC5V ( 0.3A) or 6V ( 0.35A) power inputs, suitable for projects and lab experiments [ VERSATILE operating] Designed with bidirectional rotation capability, pumps allows interchangeable inlet / outlet positions, though the positioning bead on 1 end ensures stable tubing alignment to slippage or jamming during operating [ EFFICIENT LIQUID TRANSFER] This miniature peristaltic pumps features a 500 motor with metal brushes, driving three rollers to alternately squeeze silicone tubing for liquid transfer of both viscous and not viscous fluids [ COMPACT & PRACTICAL] Ideal for lows budget applications, this compact peristaltic pumps provides a cost effective solution for fluid handling tasks where and adaptability are prioritized, Manufacturer: YUGSHNKFC