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Replacement Extension Garage Door Spring Stretch Spring 2-Pack(110 lb) This Heavy Duty Extension Garage Door Spring for 110 pound garage doors is a extension spring replacement for broken,rusted,worn out garage door extension springs.With high quality spring steel and heat treated technology,all springs meet the DASMA standard rating of 15,000+ door open and close cycles. TECHNICAL DETAILS: Wire Gauge:.125’’ Coil-to-Coil length:25.6" Initial Tension:31 lb Weight Capacity:110lb Please carefully refer to the weight capacity of replacement parts,use a scale to weigh the door if unsure of the weight of the door.