Description: Material: This bike saddle bag stabilizer is made of aluminum alloy which is wear resistant, durable and can be used for long time. Replace part: The water bottle rear holder can be used as a spare part to repair the old or broken accessory of the bike. Application: The bicycles back support can not only hold the rear bag but also can fix the water bottle when cycling. Waterproof: This saddle bag rear mount is designed to be waterproof so that can be used even in the rainy days without worries. Easy to install: The cycling bag bracket is lightweight with mounting holes so that can be installed on the bike easily. Specification: Material: Aluminum alloy. Size: Approx. 17x15x12.5cm/6.69x5.9x4.92inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Bike Saddle Bag Bracket(with 1 Set Installing Accessory).