Garage Door Extension Spring For 7'Ft.- 140 lbs Dark Blue SHOP BY SPRING SIZE_225-1-3/4-29 Install bracket to wall on

Install bracket to wall on JR-ST- or JRG if desired to keep unit from swinging

1 wall bracket and a 1/4" key External chain

connect the garage door to the garage door opener trolley

262 Wire Gauge

Garage Door Extension Spring For 7'Ft.- 140 lbs Dark Blue SHOP BY SPRING SIZE_225-1-3/4-29 Install bracket to wall onGarage Door Extension Springs for 7' High Single Loop Professional high tensile steel, Rated 10,000 Cycles 25" relaxed; will stretch to 42" Note: These springs are for use on standard sectional doors only, The only way to get the proper extension spring is by door weight.. we recommend using a bathroom scale to weigh the door before ordering.. we cannot tell you what your door weighs from a description of the door