Each tile comes with disc and female threaded sleeve for attachment or removal to polish. Available in plain field 20 x 20 cm too.
EASY METRIC CONVERSION
cm to inches: example 1: example 2: formula:
2.54cm = 1 inch 25.4cm = 10 inches 30.0cm = 11.81 inches take number of centimeters indicated in the description, width, projection or height and simply divide by 2.54 this will give you the dimension in inches!