Get Ready for the Road Ahead with a smooth and reliable spring-operated door assembly, with the Whiting 96" Aluminum Roll Up Door Double Cable Balancer Assembly. Thanks to its robust double cable design, this replacement balancer assembly is the optimal choice to allow your heavy duty roll up door to open and close with ease. Built with corrosion and rust-resistant metals for long-term durability in harsh conditions and humid climates. FleetPride is your First Click in Heavy Duty .