Set of 4 Class 15 Bobbins - Transparent.
For Singermachines that use a plastic class 15 bobbin, Atlas, Brother, domestic (rotary), Elna, Kenmore (rotary), Morse, Necchi, New Home (rotary/old style), Pfaff, Sewmore, Universal, White (rotary) and Wizard machines.
Never add thread to a partially wound bobbin. A bobbin filled this way is often uneven and may cause thread to tangle or break.
