HIPA Pack of 2 Snap in Primer Bulb Pump 188-512 with Fuel Line Hose for Poulan Ryobi Chainsaw String Trimmer Replace manufacturer part number: 188-512, 188-512-1 CRAFTSMAN RYOBI UP04033 300780004 300780001 Fits Poulan 35879158 35879558 35879898 3587952 35879556 35879516 3587958 35879518 HOMELITE HLT28 ST145 ST155 CS50 CS4018 CS5020 D4150B D450B D4550BC CS40 Package include 2pcs primer bulb, 4pcs 6-inch fuel line hose