CHENGYIDA Upper Knife Blade fits SINGER Serger 14U, 14CG, 14SH Riccarlock Pfaff #412585 Fits : Serger 14U Series Model, 14U12A, 14U13A, 14U23A, 14U32A, 14U34B, 14U44, 14U44B, 14U46B, 14U52A, 14U53A, 14U64A, 14U65B, 14U85B, 14U234, 14U234B, 14U285, 14U286, 14U344, 14U354, 14U444, 14U454, 14U454B, 14U544, 14U554, 14U555, 14CG744, 14CG754, 14SH654, 14SH644, 14SH744 & 14SH754, Pro4D and more Babylock: BL202, BL302, BL400, BL450, Elnitalock: T-3, T-33, T-34, T-34D, Happylock: 1867, Serge-Mate: 300, 430, SW432, 4350D, 5030, 5040L, Pfaff: 756, 4762, 4772, Riccarlock: RL613, RL613E, RL624, RL624E, RL634DE, RL724E, 564DE, Simplicity: SL200, SL350, SL370, SL390, SL803, SL804, SL804D, SL843, SL4300, SL4360ED