Garage Door Extension Spring For 7'Ft.- 90 lbs Light Blue Shop By Gauge_11 Gauge and the teeth are 1

and the teeth are 1 1/4" wide (all sizes are approximate)

These style brackets are used on most sectional garage doors

2  x Adjustable Top Fixture Brackets - Wide Body Brackets

with a 1/2" bore

It comes with winding and anchor cones pre-installed for easy installation

Garage Door Extension Spring For 7'Ft.- 90 lbs Light Blue Shop By Gauge_11 Gauge and the teeth are 1Garage 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