Features 1. High-standard craftsmanship and high-end steel are used to ensure that the test tube is not damaged during use and is durable. 2. The details show ingenuity, each part of the test tube clamp is carefully crafted, the spring is fully elastic and professionally anti-rust treated to ensure safe clamping. 3. Universal and flexible, the test tube clamp can easily adapt to test tubes with diameters up to 5cm to meet a wide range of experimental needs. 4. Safety protection: Using this test tube clamp can effectively isolate heat sources and chemical substances, providing an extra layer of protection for your hands, making experiments more secure. 5. A must-have in the laboratory, the test tube clamp is an indispensable tool in measurement and mixing experiments. It is suitable for storing and operating test tubes of various specifications, making experimental operations more efficient. Specification: Condition: 100% Brand New Material: Steel Weight: Approx. 112g / 4.0oz Whole Length: Approx. 14.5cm / 5.7in Package List: 5 * Test Tube Steel Clip Note: Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List