1 powerboats 26 feet long but less than 40 feet long must carry at least two B-1 fire extinguishers or the equivalent, such as a B-2 fire extinguisher; 2  powerboats 40 feet long but less than 65 feet long must carry at least three B-1 fire extinguishers or the equivalent, such as one B-1 and one B-2 fire extinguisher.
Rather, the core is made up of a non-toxic mineral called graphite. The common name âpencil leadâ is due to an historic association with the stylus made of lead in ancient Roman times. If youâre looking for information on potential lead exposure risks in pencils, Click here.
Definition of graphite. 1  1 : a soft black lustrous form of carbon that conducts electricity and is used in lead pencils and electrolytic anodes, as a lubricant, and as a moderator in nuclear reactors. 2  2 : a composite material in which carbon fibers are the reinforcing material.