The new bottle cage is of good quality and practicality. The bottom of this bottle cage is equipped with an adjustment knob for easy adjustment of the bottle cage. In addition to different sizes of kettles, you can also install mineral water bottles, cans of and other types of drinks, and different sizes of kettles, which are very practical. The workmanship is meticulous, and the hand feels comfortable. The plastic bottle cage avoids the metal fatigue of the metal bottle cage and the paint peeling and abrasion caused by the metal friction bottle. Specifications: Color: black/red/white Material: high-strength engineering resin Weight: 60G Size: 7.3X8.5X16.5CM Adjustable range: Applicable kettle diameter is about 55mm-75mm 1. The small coefficient of friction can prevent the paint from falling off the metal friction kettle 2. Strong toughness   High quality, exquisite workmanship, high cost performance, strong practicability Package Included: 1*Bottle cage 2*screw