Tfwadmx Bicycle Water Bottle Holder Adjustable Bike Drink Cage Plastic Corrosion Resistant Lightweight Sturdy Easy Install Made of Makrolon Material ,High Tenacity and Quality,Perfect in Workmanship,High Performance Cost Ratio. Strong practicality.With Adjustble Knob on the Bottom of the Water Bottle Cage . Suitble for Most Water Bottle Whatever it is Big or Small. The Product is Designed According to the Shape of the Water Bottle , Fix Good , not Easy to Shaking and Scraping the Water Bottle. Suitble for the Water Bottle Diameter Range from 2 to 3". Package Content2 PCS Red+Black