HIPA Primer Bulb + Fuel Filter + Fue Line for Homelite BP250 HB180 HB18V GST GST18 GSTBC HBC18 HBC30 HBC30B HGT HLT15 HLT16 HLT17C HLT18 HLT28 HT17 HT19 ST155 ST175 ST175G ST185 ST275 String Trimmer Blower Fuel Filter: replace P/N 49422 / ZF-1 Fuel line I.D x O.D: 3/32" x 3/16", length: 4 feet Primer bulb: replace P/N UP-04803 / 0057003 / 0057004, I.D x O.D x H: 0.725" x 0.85" x 0.75" Used on Homelite string trimmer / blowers under 30cc Package include: 2 x fuel filter, 2 x primer bulb, 1 x fuel line