1、WIDE ADJUSTMENT RANGE: The grip of this clamp has a wide adjustment range, can accommodate test tube, flask, condensing tube, etc. 2、CORROSION RESISTANCE: The laboratory flask clamp is made of premium iron spray plastic material, which is corrosion resistance and lasting. 3、STABLE SUPPORT: The clamp holder can easily fix irregular shapes bottles, and provide stable and secure support. 4、ANTI SLIP: The prong of this beaker holder has cork lining for cushioning, anti slip and is easy to use. 5、WIDE USE: This clamp is very suitable for laboratory use and can be widely used in chemical testing, chemistry, and biology teaching. Item Type: Laboratory Clamp Material: Iron Spray Plastic Maximum Clamping Distance: Approx. 10cm/3.9in Color: Black 2 x Laboratory Clamp