Accutrans is a highly-sensitive, DNA-friendly casting material for toolmarks, firearms and lifting latent prints from difficult surfaces. Accutrans quickly and easily applies casting silicone to a variety of surfaces, including human skin, rough and textured surfaces such as brick, and curved surfaces such as bottle necks. Casting material comes in dual-stage tubes, which include casting material and catalyst. When utilized, casting material and catalyst are mixed on demand through a unique mixing tip. No hand mixing is required and casting material is only used as needed. White Casting Cartridge Replacement cartridges 75 ml (4 Cartridges)