Weight: Measured 42g (variations may occur) Materials: Nylon, Stainless Steel (bolt) Applicable Mounting Diameter: 31.8mm, 25.4mm Mount Base: For Bryton Included: Hex wrench ※Garmin and Wahoo versions are also available. This is a handlebar-mounted cycling computer mount. Two nylon rings for 31.8mm and 25.4mm handlebar diameters are included. Shipped via anonymous delivery. Shipping costs will be discounted if purchased with other items that can be shipped together.