This is the Genuine Tennant, Castex Nobles Vacuum Hose. Replaces part #77320. Fits the following models: 6500 Sweeper 6500D Sweeper 6550 Sweeper 6550D Sweeper 6550E Sweeper 6600 Sweeper 6600D Sweeper 6650 Sweeper 6650D Sweeper 8400 Sweeper/Scrubber...