The Diamond Roll Up Doors Whiting W-Style 2-Spring Operator Balancer is the perfect solution for providing the necessary tension and balance to counteract the weight of your roll-up door. Constructed with high quality materials such as steel or other durable alloys, this dual spring balancer assembly allows for tension adjustment to achieve optimal door balance. It is designed to provide smooth and controlled operation of the roll-up door and is easy to install and maintain. With this product, you can be sure that your roll-up door will operate with ease and precision. Shaft Length 96 IN Spring Diameter 0.187 IN Spring Length 31 IN