3-Piece Large Acrylic Block Set for Light Demonstrations (Rectangle, Equilateral, Right Isosceles) Subject_Zoology equipping a class for compound-pulley

equipping a class for compound-pulley and variable-diameter work

For classroom and stockroom room-condition monitoring

Transparent-cased 2V 20Ah lead-acid accumulator with removable handle and printed terminal markings

plus glass

Greatly magnified HIV virion model separates into two parts exposing the outer envelope and interior capsid with RNA

3-Piece Large Acrylic Block Set for Light Demonstrations (Rectangle, Equilateral, Right Isosceles) Subject_Zoology equipping a class for compound-pulleyDesigned for class front light and prism demos, a 3 piece large acrylic block set ships a 7. 5x4. 3 inch rectangle, 7. 5 inch equilateral, and 7. 25x5. 1 inch right isosceles, all 23mm thick.