ITEM NAME:Metal Single Adjustment Extension Flask Clip Clamp For Chemistry Lab St3c Features: Surface plating, claw portion with non-slip sleeve. Suitable for holding small flask or a small cylindrical glass tube. Suitable for clamping diameter 0-30mm circular object. Specification: 100% brand new Material: Zinc alloy Full length: approx 25cm Rod diameter: approx 8mm Package included: 1pc x Three Prong Extension Flask Clamp.Suitable for holding small flask or a small cylindrical glass tube. 1pc x Three Prong Extension Flask Clamp. Material: Zinc alloy. Full length: approx 25cm.