Fits most standard sized water bottles This cycling cage is designed to fit most water bottles. Specially designed by a cyclist, it allows you access to your water bottle while you ride. Stay hydrated!! Easy to Install & Use Insert the screws through the holdes in the bike cage and thread into the holes on the bike frame NOTE 1.Screws are not Included 2.Do not overtighten the screws Features: Help you to place the water bottle in the bike Durable, convenient and lightweight design Allows to use on road and mountain bikes Specification Material: plastic About 7.5 cm/2.9 inch inner diameter Color: Black Length:about 15 cm Applies to: general cycling, mountain biking, road vehicles, folding bike. Package Contents: 1pcs x Plastic Water Bottle Holder