Round Polypropylene Test Tube Rack for 12 Mixed Tubes (4 x 25mm + 8 x 19mm) Biology_Entomology & Zoology plano-convex and double-convex lenses

plano-convex and double-convex lenses

and stomach demonstrates internal anatomy and organ relationships for ichthyology teaching

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

DIS ignition coils

Compact all-metal boss head with two stainless steel thumb screws joins rods up to 15mm orthogonally

Round Polypropylene Test Tube Rack for 12 Mixed Tubes (4 x 25mm + 8 x 19mm) Biology_Entomology & Zoology plano-convex and double-convex lensesPolypropylene 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.