1. Size: 3*7*3mm 2. Material: Chrome steel 3. ... vibration and low noise… For instance, Office equipments, Micro motor, Meters and instruments equipments, Laser engraving equipments ... Stepping motor, VCR drum, Model toys(such as remote control toy plane, slot car, yoyo), Computer cooling fan ... washing machine, dish-washing machine, Small electronics, Electric fan, Vacuum cleaner, Exhaust fan in kitchen), ...