Garage Door Extension Spring For 7'Ft.- 140 lbs Dark BlueGarage 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

Does not secure to the wall or garage header

This left wound torsion spring comes in a brown finish with a 0

31' inch length

Use on 1' in tube or 1 1/4 solid shaft with 1/4 keyways

-Complete Kits - 8' (Width) x 7' (Height) * with four panels only

207 wire size and a 2 inch inside diameter

075 Thickness

Maximum cable diameter 1/8

Compatible with chain drive Chamberlain sears craftsman manufactured operators 1984-current

DIMENSIONAL SPECIFICATIONS: Each drum boasts compact yet sturdy dimensions

012381956654

For use with 2" inside diameter springs