Replace worn garage door springs with the P528 28-inch Plug-End Extension Spring from GAS. This 2-pack is designed for heavier 1-piece, tilt-up, or canopy-style garage doors. Crafted from high-grade steel, these springs offer reliable performance and durability. Two P528 springs support doors weighing 105-175 lbs with an initial tension of 135-145 lbs; four P528 springs support doors weighing 200-350 lbs. Key specifications include a 28-inch length over coils, a 1-5/8 inch outside diameter, and a 0.207-inch (No. 5) wire gauge. An allowable stretch of 22 inches ensures proper function. Compatible with either 4 Chook’s or 4 Whook’s (sold separately) for secure jamb connection. GAS is a trusted supplier of high-quality garage and sliding door parts with over 10 years of experience, serving the home improvement industry from Florida, United States. Enhance your home with dependable garage door components from GAS. These springs provide a reliable solution for smooth and safe garage door operation, ensuring long-lasting performance and peace of mind. The plug-end design offers easy installation and compatibility with standard garage door systems. Ensure your garage door operates safely and efficiently with these essential replacement springs.