Shock mount designed for the effective attenuation of stucture-borne noise. Muting at 40 Hz: approx. 20 dB. Especially for MKH 20 - MKH 70 range and MKH 30 with MKH 20 - MKH 50 as an MS pair. Extra strong rubber O-rings are included for use with the MKH 60 and MKH 70. With 3/8", 5/8", and 1/2" thread insert.