Compared with common keypads, ours are made by SI, NR, CR, NBR, SBR, EPDM, IIR, FR and many other kinds of silicon rubber, which are of environmental, water-proof, dust-proof, fireproof, greaseproof, etc. Adopting the high-tech of laser etching makes it possible for our products to possess long life terms. Our products are famous for their good abrasion resistance, thermostability and so on. If you are interested in our products, please call us at 86-0755-84265550 or (+86)13530823187