Product details: The material used in our product is high-quality 304 stainless steel. If you want to attach a roof rack, a solar panel, a portable shower, etc. to the roof of your van, you usually need a roof rack installed. This process requires drilling into the roof, which will permanently damage your precious vehicle. The roof mounting kit allows for hassle-free installation of all roof bars and other roof-mounted accessories without the need for drilling! This is made possible thanks to our revolutionary roof rack mounting adapter. The Aty roof mounting kit is laser cut and coated with anthracite oven paint. It offers a high-quality and simple solution at a reasonable price. Stainless steel gauge: 2mm +/- 0.1mm. 2 pieces of galvanized metric threaded bolts Ø6 mm. 2 pieces of washers compatible with stainless steel metric threaded bolts Ø6 mm. 2 pieces of stainless steel metric threaded bolts Ø6 mm compatible with Nyloc nuts. Compatible roof type: For cars without screw holes in the roof. Number of pieces: 4 pieces.