... ,21 air vents,good ventilation ,240g 4,factory direct price Bicycles PartsName 21 Air Vents In-Mold Bicycle HelmetModel TK-12P21Color ... blue,dark blue ,yellow,blackAir vents 21size L(55-61cm)Sale Status Hot sell, off the shelf Specifications and Advantages TUV ... -20 days after confirmation About usWe have large quantity of bicycles parts helmets in stock, so we can offer you this ...