This 3-piece weight set by Ohaus is a vintage item that belongs in the calibration weights category. The set includes weights of 1lb, 2lb, and 2lb, totaling to 5lbs. The brand is known for its quality and reliability in the market of medical/lab equipment attachments & accessories, healthcare, lab & dental, and business & industrial fields. The unit type of these weights is in pounds, and the package dimensions are 5.0x3.31x1.89 inches. This weight set is perfect for those who are looking for a reliable and accurate option for calibration purposes.