Description: Heavy duty; extension springs. Spring Size: 150 lbs. Color Code: Silver. 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 doors: 9' Wide x 7' High; 4 Panels; 4 Sections (1 spring on each side) AND doors 16' Wide x 7' High; 4 Panels; 4 Sections (2 springs on each side). Special length for Frantz doors
