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This kit bundles a matched pair of double loop extension springs, four 200 lb pulleys, lift and safety containment cables, straps, and fasteners for a complete replacement. Springs are rated for 10,000 cycles and sized by door height and weight. It suits DIYers replacing worn extension springs on 7 or 8 ft doors up to 200 lbs. Unlike buying parts separately, it includes safety containment cables and lubricant, but it is not for torsion or TorqueMaster systems.
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Lowest price we've seen: $79.03 on Nov 15 at Preferred Doors. Tracked across 3 stores since Nov 15.
This kit includes everything needed to install or replace a garage door extension spring system. It comes with a matched pair of double loop extension springs, an Extension Spring Lift and Safety Containment Kit, and a 1 oz bottle of Express Garage Doors lubricant. The springs are matched to the door's height and weight.
The springs are painted and color coded, and they are rated for 10,000 cycles. Colors repeat every 100 lbs, so order by door weight, not by color. The kit is not compatible with torsion or TorqueMaster spring systems.
Extension springs are under tension. Always install them with the safety containment cables, and have at least one other person help so the door cannot drop suddenly. To weigh the door, disconnect the opener and secure the door open. Remove the springs from the track supports. Lower the door slowly onto a bathroom scale placed under its center. For a heavy door, use two scales with a 2x4 across them and add the readings together.