Historically other woods, particularly boxwood, were used. Most good
value clarinets are crafted from plastic resin, including ABS. Resonite is Selmer's trademark name for its type of plastic. Metal soprano clarinets were average in the early 20th century until plastic instruments supplanted them; metal construction continues to be used for the bodies of a few contra alto and contrabass clarinets and the necks and bells of nearly all alto and bigger clarinets. Ivory was used for a few 18th century clarinets, but it tends to crack and doesn't keep its shape well. Buffet Crampon's Greenline clarinets are crafted from a composite of grenadilla
wood powder and carbon fiber.