We can offer all kinds of flat & high plastic cartridges, used in bathroom faucets. Material: plastic outshell and ceramic discs inside Size: diameter 25mm, 35mm,and 40mm The frictional times are 300, 000 to 500, 000, the density is3. 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 and samples. Looking farward to cooperation with you.