Premium Horizontal Strata Erosion Model, 24 x 16 x 5.5" Gifts_Bar the wider half-disc face extending

the wider half-disc face extending the available beam-entry zone for refraction and total internal reflection investigations

Insulated 2mm-plug lead in the small-scale lead family

applying tension to material strips until failure for breaking-strain and tensile-strength measurement in materials-science work

Color-coded life-size brain model distinguishes cortical lobes

5-inch grounded brass disc

Premium Horizontal Strata Erosion Model, 24 x 16 x 5.5" Gifts_Bar the wider half-disc face extendingHorizontal strata model of the Grand Canyon and Grand Staircase region on a 24 inch wooden base, identifying 27 geologic features from Bryce Canyon to the Tapeats Sandstone.