Description: Heavy duty; extension springs. Spring Size: 110 lbs. Color code: Blue. It is always adviseable to replace all door springs, even though only one may have broken; safety cables protect against personal injury and property damage from broken springs. Rated at 10,000 cycles. Used on: Wood Door, 8' Wide x up to 6'6 in. High; 2 Panels; 4 sections AND Fiberglass Door, 16' Wide x up to 7' High; 4 Sections. 1 spring on each side of door (2 springs on door).
