DescriptionMade of iron material, test tube clamps are high temperature resistance, reliable and sturdy, and has long service life. The holder clamp is suitable for fixing test tube, flask and condensing tube in laboratory, wide application.Features-Color:As Shown -Material:Iron -Size:19.20X2.50X2.00cm/7.55X0.98X0.79in - Made of iron material, the clamp more durable and reliable, smooth to touch and rust resistant. -These flask clamps feature an ergonomic design which provides a comfortable grip and allowing users to work more efficiently. -Lightweight and portable, compact size, test tube holder clip is very convenient for you to carry and store. -Fine and smooth surface gives this clamp a nice and clean look, not easy to rust and corrosion resistance. -Test tube holder clip is designed specifically for experimental test tubes. Suitable for laboratory classes use.