WINOMO 360pcs Watch Band Spring Bars Link Pins 6mm-23mm with Watch Pin Remover Kit 360pcs 6mm-23mm silver tone stainless steel watch band link pins spring bars in 18 different sizes and one watch pin remover in one set will be sold together. Material: durable stainless steel. Spring bars total quantity: 360 pieces. Thickness: about 1.5mm. Watch band link pins spring bars in 18 different sizes, and each size includes 20 pieces: 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm. Stainless Steel watch pins spring bars with double shoulders, used for metal watch strap links. Those spring bars are kept in a transparent plastic box for keeping the 18 different sizes separated and easy to access.