STANAWAY Bicycle Water Bottle Cages With Connectors and Screws - Lightweight Alloy Aluminum Bike Water Bottle Holder Cage Brackets Easy To Install (2 Pack) LIGHTWEIGHT AND HIGH-QUALITY MATERIAL: This bottle cage is made of premium stainless aluminum alloy, each bottle cage (with a connector) weighs 3.1 ounces. The high-quality material to ensure holders lifetime and manufacturing process reinforce for extra strength. FIT FOR MOST OF WATER BOTTLES: This economic and basic designed bottle cage fits most of the bottle. This Aluminum has no welded pieces so it can expand to your water bottle better. TWO WAYS TO USE: 1, Install WITHOUT CONNECTOR: use a hex key to fasten cages in threaded screw holes on frame. Please note, if you don't want to use connector, your bike frame requires two threaded holes for installation of cages; Install WITH CONNECTOR: directly install it on the handlebar or any other frame, very convenient for you if there are no threaded screw holes on your bike frame, make installation more easy than most other similar products. WON'T SCRATCH BIKE FRAME: The bottle cage fits flush with bike frame, effectively reducing wear and tear, and wont scratch the frame, it's perfect for you and your bike.. WHAT YOU WILL GET: Buy Stanaway bike water bottle holder, you will get not only two holders, but four screws and two connectors.