Genuine OEM Stihl 4229 120 1800 Air Filter BG85 BG50 BG65 BG55 SH55 SH85 $8.49 Brand STIHL Type Air Filter Number in Pack 1 condition New Genuine OEM Stihl 4229 120 1800 Air FilterKeep your Stihl equipment running as it should with genuine parts.Fits these Stihl models:BG50 BG55 BG65 BG85 SH55 SH85