... A+,A,B+,B and C Technics designed by 3D high accuracy, small error Finish Die pressing or molded by tooling ... , toys,bikes, RVs, boats, pumps, furniture and more.Characteristics:high temperature, ozone, oil, Grease resistanceSpecificationA) Standard and NonstandardB) Different ... the adverse effects of chemicals.5) Has outstanding resistance to high and low temperature performance, -70 °C - +160 °C ...