Item Type: Bobbin Thread Buddies Function: Suitable for sewing machine, spool storage device Specification: 90Pcs, random color Material: Silicone + Plastic Package List 90 x Bobbin Clip(30 x Silicone Bobbin Ring; 30 x Silicone Bobbin Clip; 30 x Plastic Bobbin Clip) 1These bobbin clips are made of soft silicone and high-quality plastic, which are durable and reusable. 2After using the spool hug, just stretch the spool saver and hug the spool within one second, the spool does not need to be completely covered. 3This bobbin thread buddies can be used for most sewing and embroidery spools (except large commercial or extra large spools). 4The bobbin clips suitable for clamping on the spool or removing it from the spool. When the bottom thread is not used, it is very helpful to prevent the bottom thread from separating. 5These clips prevent the bobbin thread from unraveling and knotting, and ensure that the bobbin is neatly stored and organized.