Hign-concerned Chemical:NonePlacement:FRONTOrigin:Mainland ChinaMaterial:plasticsFeatures : 1,All-Season wiper blades eliminate the need for a snow or summer blades. 2,Durable material offers longer performance life over other conventional wiper blades. 3,Specially blended rubber delivers the ultimate smooth, clean, streak-free and chatter-free wipe. 4,Flexible spine design fits the windshield better, providing superior windshield contact. 5,Aerodynamic design significantly reduces drag, noise and wind lift Bracketless design helps prevent snow and ice buildup. Describe Material: Natural Rubber Model: Double layer rubber Size: 18 20 22 24 Package contains: 1pcs * car wiper 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.