Air filter Replaces OEM number:

Husqvarna 5781209-01;578120901;578 12 18 B;Husqvarna K268;Husqvarna 3120K;Husqvarna 3122K
+
HUSQVARNA # 506-26-86-01 506268601；506268601, F456782, 506-2686-01, 578120901, 578-1209-01.
3120K