1200 New Watch Band Spring Bars Pins. This is a new assortment of 1200 spring bars. These nickel plated brass spring bars are used to attach watches to watch bands. They come in a storage container that measures approximately 8 3/4" x 4 1/2" x 1 1/4" (222 x 114 x 32 mm). You receive: One hundred 6 mm (0.23622") spring bars. One hundred 8 mm (0.31496") spring bars. One hundred 10 mm (0.39370") spring bars. One hundred 11 mm (0.43307") spring bars. One hundred 12 mm (0.47244") spring bars. One hundred 14 mm (0.55118") spring bars. One hundred 16 mm (0.62992") spring bars. One hundred 17 mm (0.66929") spring bars. One hundred 18 mm (0.70866") spring bars. One hundred 19 mm (0.74803") spring bars. One hundred 20 mm (0.78740") spring bars. One hundred 22 mm (0.86614") spring bars.