A Calibration Weight Set, offered by National Scientific Corporation, is a high-precision collection of standard weights used to calibrate and verify the accuracy of weighing instruments. Widely used in laboratories, industries, and quality control applications, it ensures consistent and reliable measurements. Made from durable materials with exact mass values, the set is portable, easy to handle, and user-friendly. It supports precise calibration, maintains instrument reliability, and ensures compliance with professional and industrial measurement standards.