Item Name: Outdoor Track Nuts Kayak Accessories Kayak Rail/Track Screws Hardware Gear. Description Color:SilverSize:As Picture ShownMaterial: Stainless Steel100% Brand new and high quality.Model: M6Features: 304 stainless steel construction, rust and corrosion resistant.Nut size: 29 * 13 * 3mm (1.14 * 0.51 * 0.12in).Almost universally fits any track system on boats.Mount any kayak accessories with this kit.Easy installations with M6 screwdrivers (not included).Perfect kayak mounting hardware replacement kit for kayakers.Package Included: 4 * Screw 4 * Track NutNotes:1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow 1-3cm measuring deviation due to manual measurement.