1 Piece Serger Lower Knife 788013009 for Elna Janome New Home Kenmore Pfaff 204D, 504D Sewing Machine Serger Lower Knife 78801300 - Elna, Janome New Home, Kenmore, Pfaff Fits Janome/New Home: 204D, 504D, 534DR SERIES II, 634D, 644D, 788, 888, 1110DX, 3434D, 7034D, 9002D, 9102D, HF504D & HF3434D Fits Elna: 664 Fits Kenmore: 385.16644690 Fits Necchi: 6002 / Fits Pfaff: 752 & 4752