These are spring bars with a diameter of Φ1.8mm, slightly thicker than Φ1.5mm (standard Φ1.78 stainless steel). They are used in waterproof watches (military, divers, etc.), but can be used in most spring bar watches. They are also durable for NATO nylon straps. They are also useful as repair and replacement parts for junk watches. 【Important】This product is: Φ1.8 x Lug width in mm x 4 pieces This is not the total length of the spring bar. The lug width dimension, as shown in the second image, Please be sure to measure the lug width (the belt attachment width on the watch body side). We are not experts, so we do not know the pin shapes of spring bars for each watch brand. Please check carefully before purchasing. ※We will strive for prompt shipment, but it will be sent by regular mail.