HIPA Carburetor Carb for STIHL BR420 BR400 BR340 BR380 BR320 SR420 SR400 SR380 SR340 SR320 Backpack Blower Sprayer HD-4A HD-4B HD-13B New high quality carburetor assy Replace manufacturer part number: 4203 120 0601, 4203 120 0603, 4203 120 0605, 4203 120 0607 Fitment models: STIHL BR320 SR320 BR400 BR420 backpack blower sprayer HD-4A HD-4B HD-13B Qty: 1pc