Silverstein Works CRYO4 Ligature Bass ClarinetBass clarinet ligature model CRYO4 with 18K gold plating The CRYO4 ligatures feature a 18K gold plating for a fuller and rounder sound. Their strong projection and fast response are due to their unique design that not only enhanced the harmonics but also maximize the reed vibration. With their new "fine tuners", the CRYO4 ligature gives the player a better control on the sound as well as maximum resonance. The minimalistic design of the Silverstein