material:sponge block bonded with abrasive ,such as aluminum oxide ,silicon carbide.
feature:flexible ,stretchy ,sponge block have different density .
application: dry and wet grinding ,suitable for surface grinding ,and can be reusable .keeping long time grinding with water .

different sizes : general size 100*70*25 , 125*100*25 , 140*114*5 , 125*100*10 and so on .
grit: P36  P40  P50   P60  P80  P100  P120  P150  P180  P220  P240  P320  P400