Sewing machine bobbins! Please check your manual to make sure you are buying the right kind.

4-Hole Metal - Singer Type - For Singer sewing machines. 4 hole metal bobbins. 4 pcs.

7-Hole Metal - Bernina Machine - For Bernina sewing machines. 7 hole metal bobbins. 4 pcs.

Plastic - Singer Machine Class 66 - For Singer sewing machines. Class 66 plastic bobbins. 4 pcs.

Plastic - For Japanese Machines -  For Japanese sewing machines.  Class 15. Plastic bobbins. 4 pcs.

Plastic - Janome / Kenmore Machine - For Janome/Kenmore sewing machines., except model 87. Plastic bobbins. 4 pcs.