Poweka 503936601 Primer Bulb for Husqvarna Stihl Craftsman Poulan Chainsaw 455 Rancher 460 445 450 435 Pack of 10 Fits for HUSQVARNA 345 346 350 353 850 Chainsaw Replace Mtd 791-683974B Ryobi 683974B Oregon 49-088-0,Bin number 188-512 Height:34mm / 1.34inch. Wide:21.4mm / 0.842inch Package inculdes 10 X primer bulbs, NON original aftermarket parts