Replaces Stihl part # 4203 120 0601, 4203 120 0603, 4203 120 0605, 4203 120 0607<br>Replaces Walbro HD-4A HD-4B HD-13B Carburetor<br>Fits Stihl SR320 SR340 SR380 SR400 SR420 BR320 BR340 BR380 BR400 BR420 backpack blowers