2 valvulas provides of 35 mm, Aluminium Colour to choose. Ultra-light valve (3 G). Anodised aluminium. For mounting into rims without camera NoTubes, Ryde, roval, etc and any rim tubelizada conical the board provides a perfect closure without significantly tighten the valve (not recommended Do not squeeze in excess the nut only with hands) shells easily removable to inject a tyre sealer or for intercabiar by other new in case of obturacion or breakage. See Shells aqui. http://wwwertasmtb/bxx-obuses/obuses-x-sauce-para-valvula-presta-o-schrader also for tubeless UST rims Weight: 8 g