This Heil part was formely known as SM-2B
The PRSM Shock Mount is a flexible support system that helps suppress low-frequency rumble on the microphone line by absorbing and damping vibrations picked up from the studio desk or console.
The PRSM is designed for use with the large-diameter professional-grade Heil Sound microphones, including the PR 30 and PR 40. Its 5/8" threads mount onto the PL-2T "Topless" and other mounts, for easy installation.
Also available in champagne color (PRSM-C]