S-Shape Test Tube Stand, Model B Type_Write On Four-diode bridge rectifier rated 5A

Four-diode bridge rectifier rated 5A at 100V with 4mm input connections and the circuit diagram printed on the case

Hollow-bodied for filling with water

this acrylic light guide traps an injected ray-box beam by total internal reflection

Polished acrylic equilateral prism at 38mm length and 38mm faces

this polished hardwood funnel-and-burette stand adjusts height up to 18 inches for consolidated benchtop chemistry workflows

S-Shape Test Tube Stand, Model B Type_Write On Four-diode bridge rectifier rated 5AAluminum S shape test tube stand designed for chemistry and biology benches, providing tiered storage that keeps tubes upright and visible during student experiments.