Male Pelvis Model, Hand-Painted Human Anatomy_Human Skeletons & Bones Tandem double plastic pulley pairing

Tandem double plastic pulley pairing 38mm and 50mm low-friction wheels on an open-sided steel frame

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

Hand-cranked to convert mechanical work into electrostatic energy

and steel in a snap-top case

Two-speed ticker timer kit printing 25 or 40 dots per second on paper tape via carbon discs

Male Pelvis Model, Hand-Painted Human Anatomy_Human Skeletons & Bones Tandem double plastic pulley pairingHand painted male pelvis model exposes the narrower male specific proportions and pelvic inlet shape compared to the female pelvis for sex difference anatomy teaching.