Regular size:6, 8, 12 inches
Diameter Regular Tolerance:+/-0.10 mm
Regular Flatness:+/-0.10 mm
Regular Surface Roughness:Ra 0.8-1.6
4", 6", 8,” 12″are regular sizes, And pore size include 15um, 30um, 50um, 100um
Materials are alumina (Color: white, light brown, dark brown, blue-gray)
Custom size (like square, oval shape, or irregular shapes) is available for us