Size(mm)                  Grain & Structure                 Backing                          Bond                  Grits  

100 x 75 x 25            SC, ONE GRIT                    Sponge                            R/R                     60    

100 x 75 x 25            SC, ONE GRIT                    Sponge                            R/R                    100      

100 x 75 x 25            SC, ONE GRIT                    Sponge                            R/R                    150    

100 x 75 x 25            SC, TWO GRITS                 Sponge                            R/R                     60/100  

100 x 75 x 25            SC, TWO GRITS                 Sponge                            R/R                     100/150