GOTOH GE101A Brand New and in original GOTOH packaging Lightweight... about 1oz. Cosmo Black finish(Black Chrome) See pictures for dimensional drawing of the item Includes mounting studs(M8 x 1.25 metric) and bushingThe aluminum tailpieces weigh 1/4 that of the zinc and produce a much different sound. They transfer vibrations differently,resulting in a woodier, more airy vintage tone -richer, rounder mids but with more upper harmonics as well.Back in the '50s, Gibson used aluminum for their stop bar tailpieces. For whatever reason, they switched to zinc, which is still used today on all but the historic line.

The aluminum tailpieces weigh 1/4 that of the zinc and produce a much different sound. They transfer vibrations differently,  resulting in a woodier, more airy vintage tone -  richer, rounder mids but with more upper harmonics as well.  Back in the '50s, Gibson used aluminum for their stop bar tailpieces. For whatever reason, they switched to zinc, which is still used today on all but the historic line.