Perfect fit: The designed to fit all hydrofoil tracks. it can be installed on a variety of surfaces such as wood, tile, and concrete. Solid and : Made of high-quality brass, the o-rings are and not easy to break. design: The is a design that allows you to easily mount your hydrofoil tracks . Product name: hydrofoil screw nuts: M8 Material: brass colour: gold Package Contents: 4 x Hydrofoil screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.