it matches the original specifications for airflow and filtration
BC 240 1st series
1540M TRE 0701 (2008) 299911483/UMT
Fits Husqvarna Models: FR2116
Replacement Husqvarna CT153, TC 338, CTH 194, CTH184 T, TC 138M Flat Pulley Helmets it matches the original specificationsFits many Husqvarna models including CT153, TC 338, CTH 194, CTH184 T, TC 138M, CTH174, TC 38, CTH2138 R, TC 142T, TC 239T, TC 138T, TC 238, CTH2642TR, TC 242TX, TC 342, CTH173, CT 154, CTH224 T, TC 139T, CTH163 T, TC 38, TC 338, CTH163 T, LT 2316 CMA2, M220 107C. Replaces: HV583512101, HV583 51 21 01, HV5835121 01, 583512101, 583 51 21 01, 5835121 01, 532436812, 5324368 12, 532 43 68 12, HV532436812, HV532 43 68 12, HV5324368 12, 436812.