Sintered FULL METALLIC pads deliver the best wear, high temperature(more than 900℃)performance and are suitable for most hash environments.LONG LIFE, 5 TIMES THAN SEMI METALLIC PADSFITAVID ELIXIR SRAM XX XOWITH FITTED SPRING Material :cuprum2PCS 1PAIR NO RETAIL PACK TO SAVE MONEYSHIP FROM CHINA, DELIVERY TIME 2-4 WEEKS