Description This test tube clamp is made of iron material, good toughness, sturdy and practical. It can help you steadily hold the test tube. Suitable for laboratory use. Features lightweight, which will efficiently relieve your fatigue of lasting holding. Features -Color: Silver. -Material: Iron. -Size: About 19.20X4.00X2.00cm/7.55X1.57X0.79in. -Note: the maximum opening distance of the clamp is about 4cm. - Made of iron material, exquisite craftsmanship makes them not easy to bend or break. - Special design and it is in fine craftsmanship. It is the best replacement for your old, broken one. - Iron made clamp holder with adjustable knobs, which makes it easy to grip tightly and accurately adjust. - This useful test tube clamp will not do damage to the test tube. It is a must-have supply for labs, school, etc. - Suitable for beginners or professional use, also the students. A essential accessory in the labs. Made of iron material, exquisite craftsmanship makes them not easy to bend or break. Special design and it is in fine craftsmanship. It is the best replacement for your old, broken one. Iron made clamp holder with adjustable knobs, which makes it easy to grip tightly and accurately adjust. This useful test tube clamp will not do damage to the test tube. It is a must-have supply for labs, school, etc. Suitable for beginners or professional use, also the students. A essential accessory in the labs.