Necessity is the mother of invention. As bottles get bigger, insulated with greater capacity, the traditional bottle cage will no longer accommodate them. The Modula Cage EX from Topeak is adjustable. With a handy wing nut fitting underneath you can easily open the jaws of the cage to accommodate much larger bottles than a traditional, standard bottle cage. The Modula Ex is compatible with bottles with diameters of between 51mm and 73mm allowing you to carry specialist bottles which are designed to insulate your drinks as you ride. Made from engineering grade plastic, the Modula Ex is built to with withstand rough treatment so that you can keep your eyes on the road as you ride. Material: Engineering grade plastic Outer Diameter: Fits ø51 mm - ø73 mm Size: 16.3 x 8.5 x 7.3 cm / 6.4” x 3.3” x 2.9” Weight: 52 g / 1.83 oz