Replacement sewing-machine bulb with a 1.2 cm screw-in base compatible with many domestic models. Provides bright task light at the needle area for accurate stitching and threading. Check your machine manual for base style and voltage to ensure a proper fit and safe operation. Keep a spare on hand for studios, classrooms, and home workrooms so projects are not delayed by a failed lamp during quilting, repairs, or detailed construction on darker fabrics and evening sewing sessions.