This economical, high quality digital caliper is constructed from extra-strong carbon fiber composite - durable, yet lightweight. It has a large, easy-to-read LCD display, on/off button with automatic shut-off feature and measures by inches or millimeter up to 4"/100mm. Battery powered (SR44, 1.55V included). With an accuracy of +/- . 0078"/. 2mm, these offer the highest degree of accuracy (as opposed to circle templates). They are the sizing tool of choice for the discriminating collector.
(The referenced size is as-packaged on blister card. The caliper itself is 2. 5" wide x 7" high. )