Boom attachment kit.Fits these headsets:H10-13.4, H10-13H, H10-13N, H10-13S, H10-13Y, H10-20, H10-21, H10-26, H4230, H4240, H4241, H4290, H6030, H6040, H6041, H6090, H6230-M, H6240-07, H6240-08, H6240-35, H6240-51, H6240-M, H6290-M, H6640i, H6740-07, H6740-08, H6740-34, H6740-35, H6740-51, H6740-M, H7240, 40074G-04, 40259G-02, 40361G-01, 40411G-05, 40411G-08, 40411G-10, 40411G-13, 40411G-14, 40411G-20, 40422G-05, 40461G-02, 40493G-01, 40493G-02, 40493G-03, 40524G-03, 40524G-04, 40596G-01, 40608G-02, 40642G-01, 40765G-01, 41084G-01, 41088G-01
