The Metron Front Hydration System has an articulated, collapsible straw attachment that enables the rider to easily take a drink, improving accessibility and convenience. It features 818ml ; fits extension width from 80 to 130mm (c-c); 2-way computer mount that provides 3 mounting position options. Flexible straw mount to allow precise angulations and unobtrusive fold-away Specifications Bottle Type Bike Color Black Volume 27 Mount Type Between the Arms Defined Color Black