Diamond wedge block: 1. Both wet and dry. 2. Polishing fast and durable. ... . Different back can be required. 4. Fast speed. Diamond wedge block is made by Xiamen Verich, which the professional supplier and ... block Diameter:TrapezoidalGrit:#30, #50, #100, #200, #400,Thickness1.5mm, 3mm, 6mm, 8mm, 10mmBack:Velcro, redi-lock, snail-lock, thread-lock, magnetic ...