Description Of Singer 66k Metal Bobbins Singer 66k Domestic Sewing Machine Metal Bobbins, 3 in a packet, suitable for Older Singer Drop in Bobbin Sewing Machines. 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 If unsure please contact and we will advise you on compatibility.
