6-Piece Acrylic Lens Set, 50mm (Convex, Concave, Plano, Meniscus) Subcategory_Lab Burners Beech wood test tube rack

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Copper plate with 4mm socket terminals for the simple-cell apparatus

Designed to electrolyze water into separately collected hydrogen and oxygen

Brass Magdeburg hemispheres on a mounted base with a stopcock for releasing vacuum

the medium-strength option for classroom investigations into magnetic poles and field-line geometry

6-Piece Acrylic Lens Set, 50mm (Convex, Concave, Plano, Meniscus) Subcategory_Lab Burners Beech wood test tube rackDesigned for safer per desk optics, a 50mm six piece acrylic lens set covers double convex, double concave, plano convex, converging meniscus, diverging meniscus, and plano concave.