Sun block effect,uv protection,heat protection,keep your car cooler,help save energy costs It also gives our films a stylish look with outstanding color stability, and provides high heat rejection with no signal interference UV-proof Blocking 99% of the UV, care of your skin. Scratch resistant 99% , 65% Heat Regjection Lasts 5-7 years on the outside of your vehicle without fading, cracking or peeling. Specifications Size: 50cm*3m Light transmittance: 5%/15%/20% Installation location: front and rear windshield, car window, sunroof, etc. Suitable models: general-purpose Product function: strong heat insulation, block ultraviolet rays, protect privacy, protect car windows .