... tooth (ISO Numbers, 220), the green circle, mainly used for scraps of acrylic resin large plates and gypsum. -2. Teeth (ISO ... Numbers, in 190), blue circle, mainly used for scraps area alloy and acrylic - resin3. Fine tooth (ISO Numbers, 140 ... ), red circle, the Lord for scraps fragile and difficult to scurf cemented carbide, acrylic - resin and ...