Lower Knife for Babylock Sergers. Part # : B447101A0Y Alternate part numbers : B4471-01A-0Y, B4471-01A-OY, B4471-02A, B4471-02C Fits Babylock models : BLE1 Eclipse, BLE1AT Imagine, BLE1DX Eclipse DX, BLE1DX-2 Eclipse DX, BLE1LX Eclipse LX, BLE1SX Eclipse SX, BLE8 Evolve, BLE8W Evolve, BLE8W-2 Evolution, BLES8 Ovation