This is the Genuine Nilfisk/Advance Vacuum Duct Gasket #56314760. Fits the following models: Clean Track S16 and L18 Klenzor 16 Clean Track 16 18 and 18W-R Clean Track S16 and L18 Extractors AquaClean 16ST 16XP 18FLX 18ST Clean Track L24 VacRide 3400...