Brand:UnbrandedMaterial:AlloyMPN:Does not applyHello! Welcome to our store!Quality is the first with best service. customers all are our friends.Fashion design，100% Brand New，high quality!Material:Stainless Steel ， BrassSize:2.2x2.8cmFeature:Fit For Any BikeExtremely loud & clear soundVolume:>75DB (International Standard)What You Get: