Dritz® Class 66 Metal Bobbins
10 PCS #172222 Metal Sewing Bobbins For Singer Class 66,66-6,99,99-13,185,185CL,192,201 Sewing Machines Accessories - AliExpress
LORJE Sewing Machine Class 15 Metal Bobbins(10pc)
Class 66 Bobbin
Here is the complete tension assembly taken from an antique Singer Model 66 Red Eye sewing machine. This would also fit Singer Model 99 machines as
Antique Singer Model 66 Tension Assembly from Red Eye Machine - Complete Assembly also fits Model 99
Metal Bobbins for Singer Models 66 66-6 66-16 99K 99-13, 101, 185
Bernette Bobbins 10 Pack
The SINGER Threaded Class 66 Bobbins with Storage Case can be used in SINGER and other manufacturers top drop-in bobbin machines. The pack contains 6 black-threaded bobbins, with 50 yards of thread in each, and 6 white threaded bobbins, with 50 yards of thread in each. The reels come in a reusable plastic case. All thread is 100% spun polyester. Consult your machines manual to ensure correct bobbin size.
Singer 12 Piece Class 66 Threaded Bobbins - Each
25 Singer 15J Bobbins for CE100 & 200
Dritz 928 Metal Class 66 Bobbins-4/pkg