• Replace manufacturer part number: 188-512, 188-512-1
• For CRAFTSMAN RYOBI: UP04033 300780004 300780001
• For HOMELITE HLT28 ST145 ST155 CS50 CS4018 CS5020 D4150B D450B D4550BC CS40
• Fits Poulan 35879158 35879558 35879898 3587952 35879556 35879516 3587958 35879518
• New high quality replacement Primer Bulb Replace mtd 791-683974B ryobi 683974B oregon 49-088-0,Bin number 188-512