Aoibox Heavy Duty Garage Door Extension Spring Kit for 7 Foot Doors with 3 Inch Pulleys for Home Use

7-foot door fit: The kit is designed for compatible garage doors measuring 7 feet in height

110-pound-gauge spring: Includes one heavy-duty double-looped extension spring identified with a 110-pound gauge and 3.8mm measurement

Four 3-inch rollers: Heavy-duty rollers facilitate garage door movement along the track during opening and closing

Two extension cables: Includes dual cable extensions tailored for 7-foot garage doors to add support and stability

Double-looped spring design: The extension spring configuration is identified for garage door hardware requiring tension and support

Wear-resistant component set: The source describes the garage door parts as made for long-lasting performance and resistance to wear and tear