General thread post for household sewing machine

Product information:
Suitable for Singer sewing machine 600/750, 2000, 4205, 4206, 4210, 4212, 4220, 4228, 4600, 620, B10005520
Product name: 974 thread Ding
Product weight: 2.87 grams
Product size: 7*3cm
Product use: Sewing machine fixed sewing spool device, additional spool shaft for upper thread

Packing list
Thread spool shaft *1