HIPA 506450501 Carburetor with Primer Bulb Fuel Filter for Husqvarna 435 435E 440E Chainsaw C1T-EL41 Replacement manufacturer part number: 506450501, C1T-EL41, C1T-EL41A Compatible with Husqvarna 435 435E 440E Chainsaw Package include: carburetor + primer bulb + fuel filter