... life.5) the blade’s rubber bar is made by double composed nanotechnology rubber, high poisonous and harmful substance ... No skip, can guarantee the wiping effect. The rubber bar and the rubber on the spring plate, they are made by ozone ... nail, rustproof and corruptproof.2) rubber bar connection: stainless still thread, distortionproof3) rubber bar: A grade rubber bar, graphitizing, ossifyproof.4) ...