Vernier Dial Caliper. Great For Measuring. This is a new plastic Vernier dial caliper. Great for measuring. The jaws measure inside and outside. Has a depth gauge on the end. This caliper measures up to 6" and 150 mm. The dial measures approximately 1 3/8" (34 mm) in diameter. It measures approximately 8 3/4" (222 mm) long. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.