Product Description Fuel Line Primer Bulb Pats for Husqvarna Chainsaw Weed Eater Trimmer, 455R 460R Fuel Filter Purge Bulb Spark Plug 503936601 Replaces Part Numbers: Primer bulb replace part for Air Purge 503936601 Fuel filter replace part for 591375401 Compatible with: For Husqvarna Weed Eater Models: Fit Husqvarna 123 223 235 240 123C 123L 123LD 223L 223R 235R 235FR 235RII 240L 240RJ weed eater trimmer; 460 rancher replacement for Husqvarna 322 323 325 326 327 weed eater trimmer and more. For Husqvarna Chainsaw Models: Fit Husqvarna Husqarvna 235 235E 236 236E 240 240E 334T 338XPT 340 340E 345 346XP 350 350EPA 353 435 435E 440E 445 445E 450E Chainsaw. For Husqvarna Pole Saw Models: Fit Husqvarna 327PT5S 323P4 325P4 326P4 326P5 326P5X 327P4 327P5X pole saw,325E 326E 326ES edger.