Made of brass, the exquisite and aesthetical mini impeller centrifugal water pump model restores realistic details with a inlet-outlet size of internal 9.0mm and 7.5mm respectively. The water pump model not only is a collectable model and handheld toy, but also can be used to upgrate and modify the motor model for pumping with various possibilities. Designed with compact and eye-catching appearance, the ornamental water pump is capable of adding more charm to your motor. Centrifugal Pump Working