WOWOWO MTB Water Bottle Holder Cage Lightweight Fiberglass & Plastic for Rid Road Mounting Bicycle Bike Cycling MODERN DESIGN:Water bottle holder, forming one, Suit for Bottom of the cup diameter greater than 55MM. ADJUSTABLE:Cleverly designed wing surrounded by rain water bottle.Suitable 600cc ~ 750cc kettle GOOD Toughness:Rugged, recessed bone bit rugged design makes the bottle cage fixed to the frame Design Science, plus a non-slip scratch resistant rubber, making kettle fixed more stable and difficult to scratch kettle Kettle design allows easy fix out, particularly in the high-intensity contest or harsh riding environments, kettle not fall