The materials of brake shoe have semi-metallic and NAO formula. The brake shoe no dust, no noise, no asbestos, lead-free, symb-free and whysid organization free. Our products are competitive. If you are interested in our products, please feel free to contact me. Thanks. Tel:0086-546-6063586 Fax:0086-546-6491848 Mobile:86-15764270308 QQ:1013785325 Wechat/Whatsapp:15764270308 Skype:ssh520910 Email:business1@sainbo.com