You may be unable to install some small parts, such as hot wheels, just because of your bike's Presta valve, with this adaptor, you can install those parts freely. <br />Suitable for bikes with Presta valve<br />With built-in rubber sealing ring to prevent air leakage<br />Full brass + rubber ring (ensure good sealing)<br />Color: bronze <br />Material: metal <br />Size: about 15 x 9.6 x 9.6 mm <br />Thread diameter: 7.63 mm <br />Valve diameter: about 4.56 mm<br />1 x Valve Adaptor<br /><img src="//agdetail.image-gmkt.com/m430/408/454/619454408/img/agdetail.image-gmkt.com/408/454/619454408/img/img6.eachbuyer.com/x22/p33/bt153_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/408/454/619454408/img/agdetail.image-gmkt.com/408/454/619454408/img/img6.eachbuyer.com/x22/p33/bt153_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/408/454/619454408/img/agdetail.image-gmkt.com/408/454/619454408/img/img6.eachbuyer.com/x22/p33/bt153_3.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/408/454/619454408/img/agdetail.image-gmkt.com/408/454/619454408/img/img6.eachbuyer.com/x22/p33/bt153_4.jpg" />