... seal: 1.1M8748,2P3395,5K1078,6T8439,7M0481,9W7225,6T8439 2.size:50-1,000mm 3.hardness:58-62HRC 4.we are ... .9mm292.8mm38mmR3000298mm328mm42mmmetal seal: Our metal seal which is widely applied in track mounted engineering plant, coal mine engineering plant, heavy loading ... its life-span is 3,000HRS. Material is Gcr15,100cr6.O-ring is NBR,silicone,FKM,VITON. My factory can produce ...