ITEM NAME:Green Motorcycle Dirt Bike Tank Gas Fuel Cap Valve Vent Breather Hose Tube Description: - One way valve inside vent - One way vent design allows the tank to breath and prevent fuel from splashing out. - There is a copper ball inside the hose - Allows air to come in and keep gas from going out - Replaces old vent line, easy to install ( It may or may not fit without modification) - Hose Diameter: 8mm (5/16") - Material: CNC Aluminum + Rubber + Copper Specification: - Fit for most of Motorcycle Motocross Dirt Pit Monkey Bike ATV Quad etc. - For KTM SX F EXC ADV CRF YZF WRF KXF RMZ 125 250 300 350 450 990 Package Included: 1 Piece Gas Fuel Tank Air Vent Hose Note: 1. Please allow slightly difference due to manual measurement. 2. Color may be slightly different since different monitor. Thanks..One way valve inside vent - One way vent design allows the tank to breath and prevent fuel from splashing out. 1 Piece Gas Fuel Tank Air Vent Hose. - Replaces old vent line, easy to install ( It may or may not fit without modification).