Includes (2) 560955001 Duckbill ValvesNew, Bulk PackedGenuine OEM Replacement Part # 560955001-2PKConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with the following: Homelite: UT-20593-A, HBC18, HBC18, HBC30, HBC30, HBC30, HBC30, HBC30B, HBC30B, HBC30B, HGT, HGT, HLT17C, HLT17C, HLT17C, HLT17C, UT-20590, UT-10848, UT10517, UT10518, UT10520, UT-15040-C, ST145, ST145, ST145, ST145, ST145, ST145, UT10514, UT10516, UT-20581-C, UT-20593-A, UT10947A, UT-10803, UT10519, UT10522, UT10526, UT15084, UT15084A, UT10550, UT10552, UT10868, UT10878, UT10861, UT10886, UT10865, UT10866, UT10887, UT10846, UT10884, UT10856, UT10858, UT10885, UT10888, UT10869, UT10867, UT10860, UT10864, UT10862, UT10859, UT10863, UT10874, UT10847, UT10941, UT10881, UT10853, UT10883, UT10870, UT10901, UT10880, UT10857, UT10882, UT10854, UT10901B, UT10927, UT10927A, UT10946, UT10946A, UT10942A, UT10945, UT10947, UT74121B, UT74123B, UT74125B, UT10901A, UT10926, UT10910, UT-10817, UT10530A, UT10786, UT-10711-C, UT-10687-B, UT-10687-C, UT-10687-D, UT-10687-E, UT-10829, ST385, ST385, ST385, ST385, ST385, ST385, ST385, ST385, ST385C, ST385C, ST385C, ST385C, ST385C, UT10782Z3300, PS33, UT10942, UT-10724-B, UT-10724-C, UT-10724-D, UT-10724-E, UT-10732, UT-10732-A, UT-10732-B, UT-10732-C, UT-10733, UT-10733-A, UT-10733-B, UT-10733-C, UT-10700-A, UT-10700-B, UT-10700-C, UT-10700-D, Ryobi: RY10518, RY10520, RY10519, RY10521