Please note: There are two types of C3-EL18B carburetor, it is divided into single tube carburetor and double tube carburetor. The carburetor in this listing is a single tube carburetor. There is no tube interface at the bottom right of the carburetor, there is no external primer bulb. Replace part number for 503281614, 503283208 Carburetor for chainsaw 340 340E 340EPA 345 345E 345EPA 346XP 346EPA 350 350EPA 351 353 351EPA I 353EPA Replaces # for # C3-EL18B, also fits Jonsered 2150, 2152, 2145 Type: Single Tube Carburetor Fitment Type: Direct Installation Material: Metal + Plastic Color: Black + Silver Package Included Package Contents: 1 x Carburetor 1 x Air Filter 1 x Intake Manifold 1 x Intake Joint 1 x Choke Rod 1 x Throttle Rod 1 x Fuel Hose 1 x Fuel Filter 1 x Spark Plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed