ITEM NAME:2x Industrial Computer Sewing Machine Bobbin Winder Rubber Rings Description Description: 1. Made of premium silica gel material, which is non-toxic and environmental-friendly. 2. Fit for different sizes of metal or plastic bobbins. 3. Easy to remove a bobbin by hand, or unwind for thread. 4. Reasonable size and lightweight, portable for carrying and using. 5. It makes the machine table clean and tidy, and keep the bobbin organized. Specifications: Material: Silicone Color: blue, purple one each Size: outer ring diameter: 135mm inner ring diameter: 90mm Package Included: Bobbin rubber ring *2 (one each in blue and purple) Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality store for you! 2x Industrial Computer Sewing Machine Bobbin Winder Rubber Rings.Easy to remove a bobbin by hand, or unwind for thread. It makes the machine table clean and tidy, and keep the bobbin organized. Bobbin rubber ring 2 (one each in blue and purple). Color: blue, purple one each.