1. The motor casing is made of ABS material of good quality and is not easy to break.
2. High-power motor is suitable for mechanical operation and stable performance.
3.Commutator, silver-containing copper with good electrical conductivity and wear resistance.
4. Better constant force spring, brush version imported from Germany.
5. Waterproof, IP68, high speed
6. Ball bearings instead of oil-impregnated bearings.
7. Iron core is made of silicon steel sheet instea...