An assortment of control knobs, audio equipment and guitar amp knobs, radio knobs, industrial equipment knobs.  I do not know what models of equipment these knobs were used on. There are three chrome knobs, mostly made of solid metal, and feel heavy.  One of the three knobs is missing the plastic base.  Some of the knobs are missing set screws.  Some knobs are chipped.  All knobs show scratches and wear and tear.  Please look at the pictures carefully before purchasing or making an offer, as they are being sold AS-IS.