Dramatically Light Weight - The last 2-Pack bike bottle holder you'll need to buy! We feature a carbon fiber + nylon composite frame for ultimate strength and with a weight of only 0.6 oz (17 grams). This hydration holder will add the least amount of weight to your bicycle and will still be the most durable on the road. Superior Material - Oftentimes water cages are made of inferior materials which bend, chip, or fall apart. No more dealing with a bent aluminum water bottle cage that damages your bottle or allows it to fall out on bumpy terrain! Versatile For Every Use - Perfect for road touring, commuting, mountain biking or leisurely rides. Our water bottle holder is compatible with standard sized water bottles that have a 2.83-2.91 in (72-74 mm) diameter and features a stylish minimalist design. Easy To Install - Easily mounts to almost any bike. Installation won't take long with our straightforward instructions that anyone can follow & using the included 2 stainless steel screws. Use a 4mm hex key (not included) to fasten the cage. Note: bike frame requires threaded holes for installation of cages. The Brand You Trust, The Accessories You Need - For more than 35 years, Delta has been the brand you can trust with US-based design and engineering. Our small, concentrated product line reflects the careful thought and dedication invested into each and every product we create.