Topeak Mono Cage CXMono Cage CX, is Lightweight and durable, a new shape holds water bottles securely Topeak Mono Cage CX Features: Material Engineering Grade Plastic Size (L x W x H) 7.3 x 8.5 x 15.2 cm Weight 48 g Buy Topeak Accessories from Chain Reaction Cycles, the World’s Largest Online Bike Store.