The cases of Zippo lighters
are typically made of metal
and are rectangular with a
hinged top. On most models,
the top of the case is
slightly curved. Inside the
case are the works of the
lighter: the spring-toggle
lever that keeps the top
closed, the wick, windscreen
chimney, thumbwheel, and
flint, all of which are
mounted on an open-bottom
metal box that is slightly
smaller than the bottom of the
outer case, and into which it
slips snugly. All parts of the
lighter are replaceable. In
all there are 22 parts, and
the Zippo lighter requires 108
manufacturing operations
