This sleek and accurate mechanical scale is fitted with a replaceable color-coded dial with popular U.S. mail rate calculations including, First-Class Mail®, Priority Mail® and Express Mail®. Dial is easily removed when rates change. Large platform for large envelopes. Small size fits comfortably on desk. Intended for private use only; not legal for trade. Scale Type: Postal; For Carriers: USPS®; Electronic/Mechanical: Mechanical; Increments: 1/2 oz. Manufacturer’s limited one-year warranty.