ROCKBROS Bike Water Bottle Holder - Lightweight Aluminum Bike Water Bottle Cage Brackets Adjustable Bicycle Cup Holder for MTB Road Bike

✔ HIGH QUALITY：ROCKBROS bike water bottle cage is made of heat-treated and strong aluminum alloy material, with a smooth surface, rust-proof, durable, sturdy and lightweight, and non-deformation, which is the perfect cycling gear for your outdoor riding adventures ✔ UNIVERSAL FITS: One-piece bottle cage design ensure its security and harmonize, flexible metallic material makes size adjustable easily, fits most standard & oversized bikes & water bottles, including the following sizes: 20, 21, 25, 24, 25 & 33 oz (500, 550, 650, 750 & 950 ml) ✔SECURE & STURDY: The bicycle water bottle holder has arms that wrap around the bottle ensures it stays in place firmly and securely whether you're out riding fast on roads or bumpy trails ✔ QUICK & EASY TO INSTALL: Our cycling bottle cage comes with 2 stainless steel bolts and a 4mm hexagon wrench to fasten cages in screw holes on the frame, mount on your bike frame in under 1 minute. The bike frame requires threaded holes to install the cage ✔SPECIAL DESIGN: The bike cup holder at only 23g/ 0.8oz, lightweight and nice-looking, 4 different gradient colors can be chosen as you like, make your cycling journey no longer monotonous