Functional Human Knee Joint Model Subcategory_Test Tubes Pan balance demonstration lever with

Pan balance demonstration lever with a low-friction brass pivot

Pairs 50mm of aperture with a 200mm focal length on a convex glass surface

Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles

this 6-inch Alnico bar pair extends field lines visibly along the magnet body for full-class iron-filing demonstrations

Six-piece polypropylene beaker set spans 50mL to 2000mL for complete classroom and lab volumetric workflows without glass breakage risk

Functional Human Knee Joint Model Subcategory_Test Tubes Pan balance demonstration lever withFlexible joint allows the model to move through knee flexion and extension, demonstrating ligament engagement and meniscus function for sports medicine teaching.