Quickly secure your tube to your strap or jersey, allowing you to more easily access your hydration. Strong magnet keeps tube in place and easily attaches / detaches for quick hydration. Full Features: Fits on all standard, non-insulated HydraFlex tubes Pack attachment fits on Webbing up to 3/4" / 20 mm Specs: Diameter 6 mm / 1/4 in Weight 9 g / 0.3 oz Materials POM, Magnet