For Nissan Altima L30 4DR 4pcs Tape-On Window Visor Deflector Rain Guard Made of high quality acrylic Smoked lens to reduce glare and allows car to be parked with windows vented Reduces wind noise while driving with windows open for fresh air Allows windows to be opened a bit, and not have rain water enter through the opening Installs with included 3M adhesive tape (Non-In-Channel Visor) 4 pc. Set of Side Window Visors 98-01 Nissan Altima 4-Door <span class="a-text-bold">Easy installation</span> - the tape liner makes all your work easier with included automotive-grade 3M tape <span class="a-text-bold">No window contact </span>- zero risk of scratching the glass or interfering with window operation <span class="a-text-bold">Better water intrution protection</span> - additional shelter around the entire window channel allows better protection while raining Hold each deflector above the appropriate window to make sure youre comfortable with the proper placement. Use an automotive surface cleaner or alcohol pad to wipe down the area where the tape will be applied. When the surface dries, slowly remove the backing strip to expose the adhesive about 2 and fold out the excess strip to make an easy-to-grip tab. Be very careful not to touch the adhesive before applying it. Carefully place your deflectors above your front window first, and using the slightly exposed adhesive, secure temporarily in place. Repeat the process with your rear window. Step back and ensure both visors line-up with the contours of your vehicle. Once properly placed, press firmly at the corners, and then slowly remove the rest of the backing strip, pressing along the visor as you go.