Features: 1. RELIABLE QUALITY YOU CAN COUNT ON - Made of durable metal/plastic, and reusable metal sewing machine bobbins, great gift for your buddies 2. EASY TO USE - With a winder slot in the center for the rewind, easy to use, essential supplies for your yarns spools. 3. WIDE USAGE - Fits for most domestic sewing machines, and embroidery machines. Perfect for quilting, crocheting, art project, crafters, quilters, upholstery embroidex, standard industrial sewing-machine 4. Size - Different size optional(as picture show)Please check the size clearly before you buy. 5. Package include: 2pcs sewing bobbins or 1pcs sewing bobbin case optional Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Specification: Material: metal/plastic Size: as picture show Purpose: Household sewing machine/industrial sewing machine includes: Choice 1: 2 x sewing bobbins(not include case) Choice 2: 1 x sewing bobbin case(not include bobbin)