Pair of 130lb. Heavy Duty Garage Door Extension Springs Stretch Springs, 25″ Lon
Pair of 130lb. Heavy Duty Garage Door Extension Springs Stretch Springs, 25″ Long,Double Loop Ends, High Precision Electrophoresis Black Coated, MIN 16,000 Cycles, for 7ft High Garage Doors. Salt spray testing lasts up to 300 hours with a minimum of 16,000 cycles (a cycle is 1 open & close of the door).