Pair of 140 lbs Heavy Duty Garage Door Extension Springs Stretch Spring,High Precision Electrophoresis Black Coated for Corrosion Resistance,MIN 18000 Cycles for 7ft Garage Door Springs Replacement

140 POUND WEIGHT CAPACITY :spring for 90 pound garage door using extension spring system,use a scale to weigh the door if unsure of the weight of the door. RESURRET YOUR OLD GARAGEDOOR:these upgraded extension garage door springs are designed to replace these rusted,worn out,dangerous springs and refresh your old garage door. HEAVY DUTY:these springs are made of high quality heat treated spring steel,tested to be durable and long-lasting. Rated for 18,000 cycles (a cycle is 1 open and 1 close). REPLACE BOTH SPRINGS:Having a mix of a new and an old spring on the same door can be very hard to balance and will keep your door from operating correctly.So we we only sell in pairs,you can also save money by buying a pair at a time. ANTI-RUST:high quality material with coat for corrosion resistance ,these springs are easy to clean and not tend to rust no matter indoor or outdoor., Manufacturer: ZhenT