[Magnetic Bobbin Holder]: These magnetic bobbin holders serve as an organizing assistant, effectively preventing thread on the spool from becoming tangled, saving storage space, helping to organize the sewing machine table, and allowing for classification of bobbin colors or types. [Easy to Use]: Attach the bobbin holder to the sewing machine and place bobbins on it according to categories for easy access; when disassembling, simply lift it gently by hand. [Materials]: The bobbin organizer is made of high-quality, high-hardness ABS plastic, which is strong, durable, and not easily broken. Dual strong magnets provide a magnetic force of up to 3000GS, ensuring secure attachment to the sewing machine. Features a silicone anti-slip, shock-absorbing design to prevent noise and movement. Size: 67 x 112mm. Compatible with computerized flatbed sewing machines, synchronized machines, double-needle machines, knotting machines, buttonhole machines, and other sewing machine bobbins. Specification: A / B Material: Plastic Color: Blue Package Contents: 1 x Bobbin Holder Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement allowance is +/- 1-3cm.