6-Piece Acrylic Lens Set, 50mm (Convex, Concave, Plano, Meniscus) Subcategory_Lab Burners the medium-strength option for classroom

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

0V max for whole-class hands-on work

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

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

6-Piece Acrylic Lens Set, 50mm (Convex, Concave, Plano, Meniscus) Subcategory_Lab Burners the medium-strength option for classroomDesigned 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.