APT Low-Profile Apartment House Trolley Operator Model APT is a low-profile apartment house operator that features a resilient-mount motor, low-profile design, industrial ball bearings on the output shaft, and quiet-gliding rail spacers.
GT
Heavy Industrial-Duty Trolley Operator Model GT is a heavy industrial-duty trolley operator for standard lift sectional doors.
MT Medium Duty Trolley Operator for Standard Lift Sectional Doors Model MT is a Medium-Duty Logic trolley operator for standard lift sectional doors. It features a high-starting torque motor, a compact design, quicket-gliding rail spacers and a quick-mount swivel header bracket.