Auto Add On CV0071 Gmc Yukon/Yukon Denali Window Deflector Rain Guard Visor 4 Pcs Smoke Made with pc (polycarbonate) material with primary resin of uv stabilisers added to stand uv radiation. Pc material has been widenly applied on automotive, aircraft and construction industries due to its durable and flexiable characters. In-channel style, mounted in to window frame rubber channel which reduces wind resistance and noise while driving. Surface preparation is key for successful installation. Without complete clean surface, no visor will survive. Although visor can be diy installation, we still recommend professional installer to handle. Installation is simple. Pc material can be easly bent to insert in to position of window glass channel, then attached to outter rubber channel with 3m double side tape. The surface where 3m double side tape attached must be completely clean without any dust, grease, oil, or chemical. Image shown is for appearance of product installed, not exact application of vehicle.