Universal: It fits for most water bottles and bikes, the largest diameter of bottles is 74mm Easy to install: Embedded screw design ensures placement and 't affect the speed. Strong Holding power absorbs vibrations, holds tightly the bottle in place when riding over rough terrain. Super toughness, encountered strong impact will not be deformed and broken. Great for rides around town or for touring and high quality Road riders and mountain bike riders'favorite. Embedded screw design ensures placement and 't affect the speed. Item type:Bicycles water bottle holder Gender:Unisex. Suitable for:Diameter 74mm water bottle. Weight:16g Colour:Black Material:Carbon fiber Size: 145 x 74mm Package Contents: 2 * bicycle Water Bottle Cage 4 * Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.