Safety and Composition: These cryovial test tubes are made without any high-concern chemicals, making them safe for handling biological samples. The plastic material used is and designed to withstand low temperatures during sample freezing processes. Design and Capacity: Each tube has a 5ml capacity, ideal for sample storage and handling, research, and educational laboratories. The scaled design allows for precise measurement, facilitating accurate sample analysis and experimentation. Packaging and Quantity: Available in convenient packs of either 36 pieces, these tubes are packaged securely to they arrive intact and ready for immediate use in any professional setting. The bulk options provide cost-effective solutions for labs of all sizes. Application Versatility: Perfect for storing biological samples, these tubes can be used in a variety of settings including, pharmaceutical, and biochemical research. Their robust design ensures they can be used in centrifuges, freezers, and during portation of samples. Color: As Shown Material: plastic Package Contents: 36*Test Tubes Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.