10mm: outside diameter 10mm, inside diameter 5mm, thickness 3mm
11.5mm: outside diameter 11.5mm, inside diameter 6mm, thickness 3mm
14mm: outside diameter 14mm, inside diameter 8.5mm, thickness 3mm
17mm: outside diameter 17mm, inside diameter 11.5mm, thickness 3mm
20mm: outside diameter 20mm, inside diameter 15.5mm, thickness 3mm