The spiral water stop clamp is made of high-grade galvanized iron material, durable and wear-resistant. The spiral handle can increase the friction force when rotating, convenient to use, save time and effort, high-quality test tube clamp, water stop clamp, great for experiments Room supplies.Features- Color: Silver.- Material: Galvanized iron.- Size: 4.00X3.50X1.70cm/ 1.57X1.38X0.67inch.- Made of galvanized iron, durable and wear resistant for long-term use.- The screw water stop clip with strong bite force, prevent from leaking.- The clip designed for laboratory instrument, school teaching, student, etc.- It has superb technology, perfect details and not easily deformed sturdy. It can meet your daily demands.- Ergonomic handle offers easier clamping and reduced hand fatigue.Packing list: 10 x clips