Get accurate results with the Pelouze Take-Along Pocket Mechanical Postal Scale programmed to calculate First Class mail rates. This dependable space-saver stows away in its own carry case, so it``s always neat, clean and handy. Scale displays only item weight. Intended for private use only; not legal for trade. Electronic/Mechanical: Mechanical; Scale Type: US Natural Scale (1:37,900,000), World Natural @ Equator; For Carriers: USPS; Increments: 0.5 oz. 4 Oz Scale