This item is spare part for the these David Clark Items: H10-30, H10-36, H10-76, H3332, H3335, 12304G-07, 12304G-08, 12508G-47, 12508P-45, 12510G-23, 12510G-27, 12510G-28, 40152G-02, 40411G-18, 40805G-01, 40958G-01, 40966G-01, 40966G-02, 41025G-01.