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

Hangs a 20mm solid aluminum cube via an integrated hook for water-displacement density work

Designed to electrolyze water into separately collected hydrogen and oxygen

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

and permittivity

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.