Prime-Line Garage Door Spring 150 lb GD 12207 Galvanized Steel 1.3'' x 22'' x 1.3'' in The Prime-Line GD 12207 garage door extension spring is a heavy-duty, galvanized carbon steel component engineered for reliable counterbalance in residential garage door systems up to 7 feet in height. With a 150-pound weight capacity, it is designed to support standard 9 ft or 16 ft wide wood garage doors?typically requiring two springs per wood door or four for fiberglass models. Featuring double loop ends and a 1/8-inch wire diameter, this spring delivers enhanced durability and secure attachment to standard lift brackets and safety cables. The corrosion-resistant galvanized finish ensures long service life in varying garage environments, while its 22-inch overall length and 1-19/64-inch outer diameter align with common residential spring configurations. Rated for 10,000 cycles, it provides consistent performance and smooth door operation over years of daily use. Features - Supports up to 150 lbs?ideal for 7 ft high residential wood or fiberglass garage doors - Heavy-duty galvanized carbon steel construction resists rust and corrosion - Double loop ends enhance strength and ensure secure mounting to brackets - 1/8 in wire diameter and 22 in overall length match standard 7 ft door setups - Replaces most common extension spring configurations for 9 ft and 16 ft wide doors - Rated for 10,000 operational cycles for long-term reliability - Compatible with 1/8 in galvanized aircraft safety cables (sold separately) - Silver galvanized finish blends with standard garage hardware - Sold individually?use 2 per wood door, 4 per fiberglass door as required - Precision-engineered for balanced lift and reduced strain on opener mechanisms Specifications - Brand Name: Prime-Line - Model Name: Prime-Line GD 12207 - Part Number: GD 12207 - Product Type: Garage Door Extension Spring - Material: Carbon Steel - Finish: Galvanized - Color: Silver - End Type: Loop (Double Loop) - Wire Diameter: 1/8 in - Outside Diameter: 1-19/64 in (1.30 in) - Overall Length: 22 in - Weight Capacity: 150 lbs - Recommended Door Height: Up to 7 ft - Compatible Door Widths: 9 ft and 16 ft (wood or fiberglass) - Cycle Rating: 10,000 - Number of Pieces: 1 (sold individually) - Country of Origin: China - Manufacturer: Prime-Line Products Product Application The Prime-Line GD 12207 extension spring is essential for maintaining safe, balanced operation of residential garage doors up to 7 feet tall. It is commonly used by homeowners, handymen, and garage door technicians to replace worn or broken springs on single- or double-car wood doors (9 ft or 16 ft wide), or as part of a full hardware refresh on fiberglass systems requiring four springs. The 150-pound rating ensures proper counterbalance, reducing stress on automatic openers and preventing premature wear on rollers, tracks, and hinges. Its galvanized finish withstands humidity and temperature fluctuations typical in garages, while the double-loop design minimizes the risk of detachment during operation?especially when used with safety cables. This spring is not intended for high-lift or commercial applications but excels in standard residential setups where dependable, code-compliant performance and ease of replacement are priorities. Always install with proper safety precautions, as extension springs are under high tension.