Penny Head Solid Cone Stopper, 10/19, Borosilicate Glass Human Anatomy_Human Skeletons & Bones Heavy-duty cork boring machine cuts

Heavy-duty cork boring machine cuts precision holes through rubber and cork stoppers for fitting laboratory glassware

5-inch optical lens set with three double-convex and three double-concave lenses at 200mm

and stirrer for thermal-mixing measurements of specific heat and heat of reaction

Three copper plates suspended in an insulated cover over a glass jar of copper sulfate solution

Penny Head Solid Cone Stopper, 10/19, Borosilicate Glass Human Anatomy_Human Skeletons & Bones Heavy-duty cork boring machine cutsPenny head solid cone stopper in borosilicate 3. 3 glass features 10 19 cone for sealing ground joint vessels with finger grip top design.