Please Note: There are two types of this C3-EL18B carburetor, it is divided into single tube carburetor and double tube carburetor. Our carburetor in this listing is a SINGLE tube carburetor.There is no tubing interface at the lower right of the carburetor,it is no offer external primer bulb.Replace part number for 503281614, 503283208Carburetor for 340 340E 340EPA 345 345E 345EPA 346XP 346EPA 350 350EPA 351 353 351EPA I 353EPA chainsawReplace for ZAMA C3-EL18B, Also fit for Jonsered 2150, 2152, 2145 modelsMaterial:plastic, metalcolour:Black ,SilverPackage Contents:1 x Carburetor1 x Air Filter1 x Intake Manifold1 x Intake Knuckle1 x Choke Rod1 x Throttle Rod1 x Fuel Hose1 x Fuel Filter1 x Spark PlugOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.