COLOR CODED IDENTIFICATION - Multi-color graduated centrifuge tube with leak-proof caps allows for rapid sample differentiation, confusion in teaching laboratories and research work. 500 pieces in various colors for efficient organization and work improvement. ACCURATE GRADED MEASUREMENT - 3ml capacity and pointed bottom with clearly graduated markings to ensure accurate liquid measurement for chemical experiments and classroom teaching demonstrations. Leak-proof cap: the integrated closure cap securely seals contents, sample loss during transport or tilted operations. Ideal for mobile lab work and frequent handling scenarios requiring containment. SAFE TO USE - Made from shatterproof material with excellent chemical resistance for long-term storage and repeated use. Withstands various laboratory conditions better than standard components that may break. PACKAGING Each lightweight package contains 500 colorful graduated centrifuge tubes (10 x 41mm each), perfect for large capacity needs in schools and research institutions. Easy to carry and replenish while maintaining workplace efficiency.