SPRINGS FOR YOUR ONE-PIECE GARAGE DOOR OR TOY HAULER - P328 springs handle a 125-250lb. door with 2 springs SIMPLE INSTALLATION - install new or replace old, rusty springs quickly and by yourself SAFETY CONTAINMENT ROD - if and when spring breaks, the coils will remain wrapped around middle rod for protection CORROSION RESISTANT - powder coated steel coils to help slow rusting process over spring life 1-YEAR WARRANTY - springs are warranted for 1 year from purchase date P328 28 in. Plug-End Extension Spring is a Holmes spring replacement for heavier 1-piece / tilt-up / canopy-style garage doors. Two P328 springs - one on each side of the door - can handle a 125 lbs. to 250 lbs. door, with an initial tension of 165 lbs. to 185 lbs. A c-hook (sold separately) is required to connect spring to jamb hardware. 2 x P328 springs support a 125 lbs. to 250 lbs. garage door Length over coils: 28 in. Outside diameter: 2 in. Wire gauge: 0.244 in. (no. 3 wire) Initial tension: 165 lbs. - 185 lbs. Maximum allowable stretch: 18.5 in.