Remove Convenient Removal Bobbins are easy to see and remove. It is easy to remove a bobbin by hand, no tangling or unwinding of thread. Stay in Place Cans fit snugly into the soft plastic channel and stay in place, even if turned upside down. Bobbin storage prevents bobbin thread from loosening or deforming without a paper tube Save time for sortingThe bobbin fits most bobbins.Spool clamps work on most sewing and home sewing thread spools, saving you time to sort it. Storage Bobbin Storage This is a storage system worry-free bobbin storage, which prevents bobbin threads from unwinding or tangling. Quality GuaranteedThe bobbin storage is made of soft silicone, durable and reusable for life, allowing the thread to be tidy and tidy. Features:High quality material, made of soft silicone, durable and reusable for life, allowing the thread to stay organized and tidy. Worry-free bobbin storage, prevents bobbin threads from unwinding or tangling. Bobbins are easy to see and remove. It's easy to remove a bobbin by hand, no tangling or unwinding of the thread. Fits most spools, the weights work on most home sewing and embroidery thread spools, allowing saves time sorting the bobbin. Bobbins fit snugly into a flexible plastic channel and stay in place, even if turned over. Bobbin storage prevents bobbin thread from loosening or warping without paper tube. Specification: Condition: brand new Material: silicone Color: as shown in the picture Outer ring diameter: about 13.5cm Inner ring diameter: about 9cm Package list: 20 x bobbin 1 x bobbin storage box