"M" style large bobbins #117061-001, steel (nickel plated) with  knurled stem for quick winding for Brother. 

Sold in pack of 5 pcs.    

Precision made in Taiwan.

Size:  25.4x10.8x6mm 

Fits Brother models: BAS-26/360/361/370/375/416

BAS-423; DB2-B740/741/745/746/747/748/797/798

etc.