Watch Strap Spring Bars Stainless Steel 1.8mm 2x Thick Heavy Duty in width sizes 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm A pair of replacement spring bar pins ( two will be sent ). These pins have a diameter of 1.5mm. Made from quality stainless steel they are perfect for leather and lighter to standard weight watch straps. Double flanged which are the correct type of spring bars for connecting watch straps to a watch case. See image in gallery on how to confirm the size required. .