1、DURABLE MATERIALS: Lab Weights made of chrome plated excellent steel material, durable, possess high surface hardness, rust and acid resistance, and strong reflective 2、HIGH ACCURACY: This laboratory quality kit is specifically designed for balance testing and weight determination with ±2% accuracy, you can use with confidence 3、APPLICATION SCENARIO: Lab weight set is mainly used to study pressure, force, torsion in the classroom or laboratory in experiment, useful and practical 4、WIDE APPLICATION: Chromium plated metal weights are ideal for laboratory, teaching or home use, provide great convenience for your study and life 5、PACKAGING INCLUDE: Lab weight set including 2 200g weights, 4 50g weights, 1 storage box, easy for you to store and carry, not easy to damage or loss