(6) Metal Rotary Bobbins, part # 744

Outside diameter is 23.9 mm

Thickness is 8.7 

Center hole has a diameter of 7 mm.

Fits White models 31, 41, 43, 75, 77, 151, 153, FR series

Fits Kenmore models 117.300, 117.551, 117.552, 117.591, 117.600, 117.720, 117.959

Fits Domestic model 153