Processing customization is material aluminum name single-way valve article number 012256 color red single-way valve, gold single-way valve, blue single-way valve, green single-way valve, black single-way valve, orange single-way valve, silver single-way valve applicable models off-road motorcycle size 65 purpose breather cap Intake valve fuel tank cover One-way vent cap, the vent valve air can enter but not exit, with steel ball Net weight: about 9 grams per piece, 7 colors are available.