SPHERON 5000A is one of the carbon blacks from CABOT's "A" grade family. The surface aspect of extruded automotive profile and window channels is very important today. Class "A" automotive surface applications demand a very low level of particles that could cause visible surface imperfections leading to rejects or 'scrap'. In response to that market requirement, a family of carbon blacks appropriately identified by the suffix "A", was developed by Cabot to address carbon black related extruded surface imperfections.