Features: 1. The glass tubing cutter is designed to scribe the circumference of glass tubes. It can cut borosilicate and flint glass, producing clean breaks. 2. The glass tube pipe cutter does not fully sever glass tubes. It scores the surface of the glass tube; alternating hot and cold treatments will cause the tube to break along the scribed line. Replace the cutting wheel if worn to ensure optimal performance. 3. Precision crafted with upper and lower clamps for secure handling. Provides smooth, clean scoring without sharp edges. Simple and easy to operate. 4. Constructed from high-quality zinc alloy material for durability and long-lasting use. Resistant to cracking and breakage. 5. Ideal for educational, laboratory, or personal use. Exercise caution during use to avoid injury. Use protective gloves or appropriate safety measures. Specifications: Item Type: Glass Tubing Cutter Material: Zinc Alloy Size: Approx. 6.4 x 6.4 x 1.9 cm (2.5 x 2.5 x 0.7 in) Function: For scoring glass tube surfaces to create clean breaks Package List: 2 x Glass Tubing Cutter Note: Manual measurement may result in a slight variation of 0.10.2 cm (0.040.08 in).