The SM-2 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 SM-2 is designed for use with the large-diameter professional-grade Heil Sound microphones, including the PR 30 and PR 40. Its 3/8 inch threads mount onto the PL-2T 'Topless' and other mounts, for easy installation. Black (SM-2/B) and Champagne (SM-2/C) colors are available.