Acoustic filter for David Clark Headset Models:
 
H10-00, H10-13.4, H10-13H, H10-13N, H10-13S, H10-13Y, H10-20, H10-21, H10-26, H10-36, H10-56, H10-56N, H10-60, H10-60C, H10-60H, H10-66, H10-66N, H10-76, H3391, H3392, H3430, H3432, H3492, H4230, H4
 
All prices include VAT