Round Polypropylene Test Tube Rack for 12 Mixed Tubes (4 x 25mm + 8 x 19mm) Biology_Entomology & Zoology this natural gas Bunsen burner

this natural gas Bunsen burner mounts on an extended anti-tip cast-iron base

plano-convex and double-convex lenses

Four-prong cork-lined retort clamp with an integrated boss head

Two rectangular slots accept square or round rods up to 16 mm in this aluminum alloy multipurpose clamp holder

Optically-worked glass double convex lens with a 150mm focal length and 1

Round Polypropylene Test Tube Rack for 12 Mixed Tubes (4 x 25mm + 8 x 19mm) Biology_Entomology & Zoology this natural gas Bunsen burnerPolypropylene round test tube rack holding 12 tubes four at 25 mm and eight at 19 mm with 360 degree access for benchtop chemistry demonstrations and student experiments.