We self research the new rubber formulation(recipe) of bearing seals, which performance has exceeded international same products. They possess excellence as follows. 1. Longer using life time.Not below 20Year. 2. Excellent weathering & ultraviolet resistance. 3. High elongation and strong abrasion resistance. 4. Excellent low temperature resistance. 5. Excellent lubricating greases resistance. Now we mainly supply the products for China Wafangdian Bearing Group Corporation, which is most famous bearing manufacturing enterprise in China. We can also make the appointed specification products according to blueprint you offered. The performance test report ----------- 1 Hardness(Shore A): 73duro 2 Tensile strength: 22Mpa 3 Elongation: 322% 4 Hot air aging 70??70h Hardness change(Shore A): +2 duro 5 Hot air aging 70??70h Tensile strength change rate: +2% 6 Hot air aging 70??70h Elongation change rate: -8% 7 1# Standard Oil resistance Volume change rate: -5% 8 3# Standard Oil resistance Volume change rate: +13% 9 Brittleness temperature: -45?栠 10 Akron abrasion: 0.030cm3 11 Ozone resistance prolongation 20% 200pphm x 40??72h: No rimous -----------