|   
                           | Elcometer 
                      129/1 Rubert Grit 
                      Elcometer  | 129/2 
                      Rubert Shot Elcometer 
                       | 129/3 
                      Rugotest Shot & Grit  | 
                 
                  | Section 
                      Profiles | 0.4, 
                      0.8, 1.6, 3.2, 6.3 & 12.5µm | 0.4, 
                      0.8, 1.6, 3.2, 6.3 & 12.5µm | N6, N7, N8, N9, 
                      N10 and N11 equivalent to 0.8, 1.6, 3.2, 6.3, 12.5 and 25µm 
                      roughness averages respectively |