This silicone protector was made in a particular size for you to tie up your watch band and its spring bars. Imagine if you own a precious watch band such as platinum, losing platinum spring bars is a misfortune. This silicone protector was designed to keep your watch band, and its spring bars safe in place. When the two are properly stored together, also save your time finding the correct pairs of spring bars to fit your watch bands. This spring bar protector comes in two sizes: 20mm or 22mm (10 pcs per pack). The material has limited flexibility but is adaptable to most of the thicknesses of watch bands, simply choose the size that fits your watch band lug.