SINGER 2139 Class 66 Bobbins, Metal, 4-Count,

This set of 4 class 66 metal bobbins serve as replacements for the following compatible machines: brands compatible with Singer models 66-1 through 66-18, 99CL, 185, 192, 201, 609, 717, and other top drop-in bobbin sewing machines. Consult your machine’s manual to ensure correct bobbin size. Use the bobbins beneath the needle plate in automatic sewing machines to wind the thread for your embroidery projects. Never add thread to a partially wound bobbin, as it may be uneven and cause thread to tangle or break.

• Set of 4 class 66 metal bobbins
• Class 66 bobbins are compatible with many SINGER models 66-1 through 66-18, 99CL, 185, 192, 201, 609, 717 and other top drop-in bobbin sewing machines
• Never add thread to a partially wound bobbin as it may be uneven and cause thread to tangle or break