This is a frosted 15 watt long light bulb with a bayonet twist-in design, compatible with Singer 221 and Elna sewing machines. It is suitable for providing light while working on crafts or sewing projects. Bernina 817, 830, 930, - Elna 11, 13, 14, 17, 21, 22, 23, 24, 27, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 43, 45, 46, 52, 55, 56, 57, 58, 59, 62, 64, 65, 66, 68, 69, 72, 74, - Singer 221, oval contacts, - Viking 1040, 3240, 3260, 5610, 5710, 6170, 6240, 6260, 6270, 6360, 6370, 6430, 6440, 6450, 6460, 6470, 6570 - Alternative number 444110
