... .model :TC ,TB,TA ,DC,SC,SB &others. 3.material: NBR , Silicon, VITON, PU ,and others . 1.item: oil seal .2.model :TC ... ,TB,TA ,DC,SC,SB &others.3.material: NBR , Silicon, VITON, PU ,and others .4 ... .color :black ,red ,brown, and others .5.brand : according to ...