... comes with flat and tidy surface without defects or crevices.6.Flat and tidy surface, no defects, crevices or separations7.We ... of friction<0.106.Strong chemical-resistantSpecification Dia(mm)5,6,7,8,10,12,14,15,16,18,20,22 ... ,40,45,50,55,60,65,70,75,80 85,90,95,100,110,120,130,140,150,160,180,200,250 ...