We offer various specs of white and pink ceramic seal rings, which can be used in the pumps, machines, vehicles, and so on. Material: 95%--99% alumina Size: According to customers' request Color: white, pink The frictional times are 300, 000 to 500, 000, the density is 3. 6~3. 7g/cubic centimeter, the rigidity is 84~86 HRA, the thickness tolerance is less than 0. 02mm, the diameter tolerance is less than 0. 02mm, meanwhile, we can manufacture according to customers' drawings or samples. Looking forward to cooperation with you.