Stark Electric Brushless Motor with Hall Sensor Reciprocating Engine Educational Toys Type_Vacuum Engine The appearance is exquisite and

The appearance is exquisite and generous

Material: The bottom plate is made of brushed aluminum alloy

2 x Colorful Led Light

remote control battery (AA battery

Stark Electric Brushless Motor with Hall Sensor Reciprocating Engine Educational Toys Type_Vacuum Engine The appearance is exquisite andStark Electric Brushless Motor with Hall Sensor Reciprocating Engine Educational ToysFeatures:. The reciprocating electromagnet used in this product is the best magnet obtained through many experiments. It can produce magnetic force in a better position in conjunction with the Hall sensor, which makes the operation effect better.. The bearing used in the product is a ball bearing, which has the characteristics of low friction, quietness and