The Horton Hercules 4000 Motor Gearbox RH 14 Tooth with harness is a heavy-duty, self-closing motor gearbox designed for commercial use. Made of steel with a stainless steel finish, this round-shaped unit is suitable for right-handed doors and has a 1-month manufacturer warranty. With a unique design and universal mounting capability, this motor gearbox from Horton and Dunkermotoren is a reliable choice for your security needs. It does not require batteries and can be easily installed.