Garmin Tacx Deva Bottle Cage. Features: Featuring a unique cylindrical shape that ensures perfect clamping, the Deva bottle cage has proven its worth many times over during cycling classics over cobblestones - Insert your bottle easily, and have confidence that the cage will keep it firmly in place. Deva has a core made of polyamide reinforced by carbon for better clamping and reduced weight (32g), surrounded by a colorful shell made with glass fiber compound Specs: Material: polyamide/carbon/glass fiber compound Color: yellow Weight: 32g