Product Description A Brand New SET of Upper and Lower Knives / Blades Fits BABYLOCK SERGER - BL202, BL302, BL400, BL430, BL432, BL450A, BL4350D, BL5030, BL5040, BL5040L Elna Serger T-3 ,T-33 ,T-34 ,T-34D. HAPPYLOCK SERGER - 1867 OMEGA SERGER - 303SI, 334D, 15J103, 15J134 PFAFF SERGER - 756 RICCAR SERGER - RL564DE, RL613, RL613E, RL624, RL624E, RL634DE, RL634E, RL724E SERGE-MATE SERGER MODELS - 300, 430, SW432, 4350D, 5030 Singer Serger 14U style: 14SH644 ,14SH654, 14u12a, 14u13, 14u32 ,14u34a, 14u34b, 14u44 ,14u46 ,14u52a, 14u53 ,14u64a, 14u65, 14u85 ,14u234 ,14u244 14u285 ,14u28 ,14u344, 14u354, 14u444 ,14u454, 14u544 ,14u554, 14u555, 14u557, PRO4D, Singer Merritt and many others. Simplicity Serger - SL200, SL350 ,SL370 ,SL390 ,SL803, SL804, SL804D ,SL843 ,SL4300, SL4300ED ,SL4360ED, Part # 412585,412749