... other metals and acrylic plastic materials. 1. Thick tooth (ISO Numbers, 220), the green circle, mainly used for scraps of acrylic ... scraps area alloy and acrylic - resin3. Fine tooth (ISO Numbers, 140), red circle, the Lord for scraps fragile and difficult ... cemented carbide, acrylic - resin and ceramics4. Very fine tooth (ISO Numbers, 141), yellow circle, mainly in the final trim ceramics, precious ...