Poweka New Pack of 10 Snap In Primer Bulb fit for Poulan Ryobi Homelite Toro Craftsman Blower Weedeater Trimmer Replace Mtd 791-683974B Ryobi 683974B Oregon 49-088-0 New high quality aftermaket replacement parts Refer to part numbers 01183, UP04033, 300780001, 300780002 & 300780004 Replace mtd 791-683974B ryobi 683974B oregon 49-088-0,Bin number 188-512 Height:31.4mm / 1.236inch ,wide:21.4mm / 0.842inch Package includes 10pcs x primer bulb