20 Metal Bobbins. Fits the following models of Babylock........

B15, B17, B21, BL66, BL200, BL702, BL713, BL722, BL1000, BL1050, BL1400, BL1500, BL1506, BL1550, BL1556, BL1750, BL2000, BL2160, BL2200, BL2300, BL2400, BL2500, BL2600, BL2800, BL3500, BL500, BL5500, BL6500, BL8800 


Bobbins measures 7/16" thick x 13/16" wide.