Acrylic Material: Our floss bobbin is made of quality acrylic, the high density of the material makes it lightweight while strong enough, waterproof and wear-resistant for long-term use Package Includes: 40 pcs floss drops, the size is 49.5x34.5mm/1.9x1.3 inch, 3mm thick, there are 8mm/18mm diameter rounds inside, with 2 pcs stainless steel rings, the diameter is 55mm Practical Design: Our floss bobbin can help organize portions of cords, makes it easy for you to find the target one. And its blank space is designed to mark words for easy identification. Applicable Occasion: It is versatile for cross stitch floss, yarn organization and storage, and is a very practical embroidery floss winding tool. Pay attention to tear off the film on both sides before use Easy to Use: Whether you're new to sewing or a veteran, you'll be able to get started quickly. The complimentary stainless steel ring can be used to string drops, convenient sorting, not messy