A smart solution for keeping bobbins wound tight and untangled. Grips bobbins tightly from empty to full and the durable silicone rubber provides optimal flexibility. Suits most household plastic and metal bobbins. Easy to use and reusable - will not damage or leave marks on your threads. 28 sets of 3, bagged and barcoded with one each of Pink, Blue and Purple. 14.6 x 15.9 x 5.2 cm (5 3/4″ x 6 1/4″ x 6″)