Savart's Toothed Wheel Length_74mm 3" (85mm) and an outer

3" (85mm) and an outer diameter of 3

preventing blowouts while anchoring the unit against accidental classroom contact

Integrated tongue and dentition at 2x life size supports combined teaching of oral cavity anatomy

Wood-handled collecting net pairs a sturdy grip with fine mesh netting for classroom field trips and introductory entomology collection work

this 20mm-diameter steel helix carries longitudinal

Savart's Toothed Wheel Length_74mm 3" (85mm) and an outerFour 7. 5cm toothed wheels spaced 6mm apart on a common shaft, producing distinct audible pitches at varying spin speeds to relate rotational frequency to perceived sound frequency.