AISEN Fuel Filter Line Primer Bulb for Homelite BP250 HB180 GST18 GSTBC HBC30B HGT HLT15 HLT16 HLT28 HT17 HT19 ST155 ST175 ST175G ST185 String Trimmer Blower Fuel Filter replace P/N 49422 / ZF-1 4feet Fuel line I.D x O.D: 3/32" x 3/16" Primer bulb replace P/N UP-04803 / 0057003 / 0057004, I.D x O.D x H: 0.725" x 0.85" x 0.75"