Upper Triple Root Molar Model with Interchangeable Cavities, 6-Part engine models measuring 11 inches in length

measuring 11 inches in length and tightened by a thumbscrew for secure benchtop support

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

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 measuring 11 inches in lengthInterchangeable cavity inserts swap into a single molar body to illustrate progressive decay stages, supporting dental hygiene and caries prevention teaching.