ROCKBROS Bike Water Bottle Cage Holder Adapter Adjustable Bicycle Handlebar Seatpost Aluminum Alloy Fork Bike Cup Mount Adapter for MTB Road Bike Brand: ROCKBROS Name: Bike Water Bottle Cage Adapter Material: Aluminum Alloy Color:Black Net Weight: About 85g; About 50g Package Dimension:10*8*1.7cm Fit Diameter:2131.8mm Installation Tool:Allen Wrench FEATURES: Made of high-strength aluminum alloy, smooth surface and solid, lightweight and durable. Bracket turns 360 degrees to suit mounting position. Complete with bolts and Installation allen wrench is included. The bottle cage mount can be mounted on any handlebar or seat post according to your habit CUSTOMER SERVICE 30-day money-back guarantee for any reason For 30 days after the date of purchase, return your undamaged ROCKBROS product and receive a full refund for any reason. 12-month warranty for quality-related issues For 12 months after the date of purchase, we take care of all quality-related issues with a REPLACEMENT.