Description: Compatibilty - G52 Back Valve & D20 Hose Swivel & Feed Hose Nut fits models 180, 380, 280, 480 PRO, 3900 Sport, Vac-Sweep 380, Vac-Sweep 280. New Upgrade - Compared with the previous backup valve , we have upgraded the shell material, which is more wear-resistant than the previous product, will not be easily damaged, and has span. The kit contains: 1 x G52 spare valve replacement kit, including gear mechanism, 2 x D20 hose ball bearing swivel joint, 4 x feed hose nut, 8 -100-3105 hose tail scrubber. Gear Mechanism - Made of friction-resistant and stable POM material, it can work continuously under -high water pressure, but if there is too much sand, the gear will be stuck. At this time, you need to remove the wheel to clean the sand to continue working. Make sure this fits by entering your model number. Specification: Length: 9cm / 3.54inch Package Includes: 1 Piece G52 Backup valve 2 Pieces D20 Hose Ball Bearing Swivel Joint 4 Pieces Feed Hose Nut 8 Pieces 9-100-3105 Hose Tail Scrubber