Metal bobbins for sewing, suitable for most standard sewing machines, such as Brother, Singer, Bernina, Pfaff, Elna, Babylock, Kenmore, Juki, etc. Bobbin diameter 21 mm, height 12 mm, center hole diameter 6 mm. If your machine's original bobbin hole diameter is 6 mm, our product will fit your machine. 25 pieces of sewing machine bobbins with a storage box, cotton thread not included. Material: durable hard metal. Fine, standard, smooth metal bobbins. Storage box size: 12 x 10 x 2.5 cm. Total weight: 135 g. If your machine's original bobbin hole diameter is 6 mm, our product will fit your machine. Suitable for most standard sewing machines, such as Brother, Singer, Bernina, Pfaff, Elna, Babylock, Kenmore, Juki, etc. Bobbin diameter 21 mm, height 12 mm, center hole diameter 6 mm,
Box size: 12*10*2.5cm/4.7'x3.9'x1' (Length x Width x Height) Total weight: 135g. Material: Durable hard metal. Fine metal bobbins, standard, work well. Package includes: A set of 25 empty sewing machine bobbins with a storage box, cotton thread not included.