Quick filler neck for quick tank canisters from Polisport (ProOctane) - Compatible with KTM tanks - Extremely fast pouring / filling rate - Automatic shut-off system to prevent leakage of fuel - Easy to use, without spilling - Diameter: 37 mm - By means of the red turntable / display, the mixing ratio for oil / fuel (1% to 4%) can be set and / or identified