The shell is an integrated sealed structure design, which has good waterproof and dustproof functions. High-quality bearings, low noise, smooth operation and long service life. The use of high temperature resistant pure copper enameled wire windings and vacuum dipping of the stator ensure the insulation level. The junction box is potted with resin glue, which has better waterproof and insulating properties. The outlet end of the power supply has a special anti-vibration protective cover to prevent the cable from being damaged by long-term vibration. Adjustable eccentric block, only need to adjust the angle of the eccentric block to meet various work requirements. Shell material:aluminum alloy & stainless steel. Number of poles: 2 poles. 1 PCS vibration motor. Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. If you have not received the item, please wait a maximum of 20 days and let us know within 7 days. Working Hours: Monday to Friday.