Garage Door 4 Less - LiftMaster Sliding Garage Door Openers and Operators
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GSD 
Heavy Industrial-Duty Door Operator for Single and Bi-Parting Doors 

Model GSD is a heavy industrial-duty door operator for single and bi-parting doors. It features a continuous-duty high-starting torque motor, a standard solenoid brake, and an emergency disconnect for manual operation.
SD 
Industrial-Duty Door Operator for Single and Bi-Parting Doors 

Model SD is a heavy industrial-duty door operator for single and bi-parting doors. It features a solenoid brake, heavy-duty hanger brackets and a durable disconnect mechanism.



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