DIMENSION: One Pair of 150lb. Heavy Duty Garage Door Extension Springs ( Red ), These are 25-Inch long at rest and 67-Inch long when fully stretched. And and fit for configurations on residential doors that are no higher than 7 ft. Tall. PACKING INCLUDED: One pair of Garage Door Extension Springs, One pair of Non-Slip Gloves, and Installation Instructions are included in the package, so you can start installing immediately after receiving the product. HIGH QUALITY: Made from professional ASTM-A228 spring steel coils that have been heat-treated to ensure they have extremely high durability. The latest electrophoretic coating technology offers excellent corrosion resistance and excellent tensile properties. Salt spray testing lasts up to 300 hours with a minimum of 16,000 cycles (a cycle is 1 open & close of the door). You NEVER need to maintain the spring and keep your hands clean during installation. DOUBLE LOOP ENDS: They are more sturdy than open