Features: Securely hold your test tubes with our clamp, crafted from wood, designed to accommodate tubes with a diameter of 10-20mm. This set includes 10pcs wood test tube clip, each measuring approximately 18cm in length, providing reliable support for various laboratory tasks. Ideal for researcher, chemistry lab technicians, and educational institutions, these test tube clip are essential tool for anyone involved in scientific exploration. Perfect for use in chemicals experiments, biological research, and teaching demonstrations, these test tube clip offer versatility across multiple experimental environment. With their ergonomic design and strong construction, these test tube holders enhances your laboratory efficiency, making them a must having addition to any lab setups. Specifications: Materials: Wood Color: As The Picture Shows Package Weight: approx.180g Size: approx.18x1.6cm/7.08x0.63in Package Includes: 10Pcs Test Tube Clip note: Please allow 1-2cm error due to manual measurement. Please make surer you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual color to the item. Thanks!