Usage Tips: Application - Good for organizing or holding all sorts of thread, bobbin, cord, twine, strings, chains and so on, and great for use on DIY, craft, sewing, embroidery, etc Size - Color: Blue, Green, Yellow, Pink; Outer Diameter: 19mm / 0.7 inch; Overall Length: 45mm / 1.7 inch Advantage - Made of silicone, no rust, reusable, smooth and sturdy. It can prevent the thread from falling off, and there are no loose ends or thread tails Instruction - Easy to use. Just applied it on the bobbin to keep the thread tidy Notice - Please read the measurements before ordering if you are concerned about the size The Bobbin Clamps are good for organizing or holding all sorts of thread, bobbin, cord, twine, strings, chains and so on, and great for use on DIY, craft, sewing, embroidery, and more. Specification Material: Silicone Color: Blue, Green, Yellow, Pink Outer Diameter: 19mm / 0.7 inch Overall Length: 45mm / 1.7 inch Advantage Made of silicone, no rust, reusable, smooth and sturdy. It can prevent the thread from falling off, and there are no loose ends or thread tails. It is a practical present to give who is good at sewing or embroidery as a hobby. Instruction Easy to use. Just applied it on the bobbin to keep the thread tidy. Notice Please read the measurements before ordering if you are concerned about the size. Package Contents: 12 pcsx Bobbin Clamps