Replaces Part # 4203-120-0601, 4203-120-0603, 4203-120-0605, 4203-120-0607<br>Replaces Walbro HD-4A HD-4B HD-13B Carb<br>Fits Stihl SR320 SR340 SR380 SR400 SR420 BR320 BR340 BR380 BR400 BR420 Backpack Blower