2 Pack Air Filter For Stihl # 4203-141-0300 For BR320 BR400 Backpack Blowers 2 quality Aftermarket Air Filters Replace Stihl Air Filter # 4203-141-0300 Fits Stilh BR3200, BR400 Backpack Blowers 1-3/4" ID, 2-7/8" OD, 1-5/8" High