ITEM NAME:Chemistry Lab Single Adjustment Three Prong Extend Flask Clip Clamp for Stand Z #aucsearchbutton #aucsearchbutton:hover { cursor: pointer;.1X Three Prong Extension Flask Clip Clamp. Suitable for holding small flask or a small cylindrical glass tube. Material: Zinc alloy. Full length: 19.5cm. Three-jaw design. Made of zinc alloy.