Includes (2) 308042003 Spool RetainersNew, Bulk PackedGenuine OEM Replacement Part # 308042003-2PKConsult owners manual for proper part number identification and proper installationPlease refer to list for compatibilityCompatible with the following: Ryobi: RY34421, RY34440, RY34441, RY15523 Extended Reach Attachment, RY30963, RY30542, RY30943, SS30, RY34442, RY28041, RY28045, RY30562, 51992, RY15522 Attachment, RY28140, RY34446s, RY30002B, RY34445, Homelite: UT22600, UT22650, UT20046, UT-21546, UT32600, UT32650, UT-20581-3, UT-20581-C, UT-20598-1, UT-21044, UT-29045, UT-21947 Mightylight, UT20004A, UT20004B, UT15084, UT15084A, UT32651, UT15180, UT15181, UT15169, UT15522F, UT200044A, UT15164, UT20810, UT21046, UT29047, UT32000s, UT32050s, UT32601As, UT32651As, UT32605As, UT32655As, UT70127, UT70127A, UT70129, UT70129, UT70129A, UT70131, UT70131A, UT20044A, UT32655s, UT33600