Upper Triple Root Molar Model with Interchangeable Cavities, 6-Part engine models 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

Six-slot polished wood rack with integrated draining pins holds 25mm test tubes and supports post-wash inversion drying in teaching chemistry labs

Glass displacement vessel in borosilicate glass holds 500mL for density measurement

3 geometry favoring strong convergence and bright real-image formation across a wide aperture

5-inch optical lens set with three double-convex and three double-concave lenses at 200mm

Upper Triple Root Molar Model with Interchangeable Cavities, 6-Part engine models Four-diode bridge rectifier rated 5AInterchangeable cavity inserts swap into a single molar body to illustrate progressive decay stages, supporting dental hygiene and caries prevention teaching.