GD12193 Size: 130 lbs Features: -Extension spring. Product Type: -Chain And Hooks. Length: -<25 Ft. Generic Dimensions: -Length: 25". -Size 70 lbs: Use on single car fiberglass door, 2 springs on door, 26.75"H x 1.25" W x 1.25" D. -Size 100 lbs: 27.5"H x 1.5" W x 1.5" D. -Size 120 lbs: Wood door( 8'' x 7'', 2 panels, 4 sections), fiberglass door(16'' x 7'', 4 sections. 2 springs on door), 27.5"H x 1.63" W x 1.63" D.