48-Piece Density Cylindrical Bars Super Set (Brass, Aluminum, PVC, Polypropylene) Lab Supplies_Weights & Masses polished and ground for image-formation

polished and ground for image-formation and refraction demonstrations in physics

Ranvier-pattern hand microtome uses a screw-thread mechanism for precise specimen advancement during thin-section cutting and microscope slide preparation

Long-format 150 x 10mm chrome-steel cylinder pair with half-red

durable enough for repeated classroom handling

Designed for divergence demos at scale

48-Piece Density Cylindrical Bars Super Set (Brass, Aluminum, PVC, Polypropylene) Lab Supplies_Weights & Masses polished and ground for image-formationForty eight piece density super set bundling four 12 bar sets brass, aluminum, PVC, and polypropylene each in its own labeled wooden storage block at identical 0. 5 inch diameter.