Vandoren clarinet and saxophone mouthpieces are made of vulcanised rubber called ebonite. Later, more durable Bakelite and Ebonite was used. The pens are made from ebonite with gold or silver plated nibs. In 1980, urethane-shell bowling balls were introduced by Ebonite. In 1851, Nelson Goodyear added fillers to natural rubber materials to form ebonite. The pistol had black ebonite grips rather than wooden ones. Charles Goodyear's brother Nelson Goodyear experimented with the chemistry of ebonite composites. His last PBA title was earned at the PBA Ebonite Classic. It was usually constructed of brass and ivory (later ebonite). He was responsible for giving ebonite its name. Track-branded products were then manufactured, under the ownership of Ebonite International, through November 2019. Ebonite contamination was problematic when it was used for electronics. Ebonite strips divide the terrazo into bays to avoid shrinkage and expansion. Any Ebonite found outside the shield was forced to undergo deep psychotherapy. Ebonite may contain from 25% to 80% sulfur and linseed oil.