US$ 423.83
and concentrated oxidizer monitoring in water-treatment workflows
Sixty-five-piece molecular model set with 32 atoms and 33 bonds for demonstrating bonding angles
this 20mm-diameter steel helix carries longitudinal
Spring-loaded heavy-gauge steel projectile launcher with a string-release trigger
Ultimate Wave Form Helix with Wooden Stand, Alternate Model Foodsafe and concentrated oxidizer monitoring inExtending up to 65 feet from a 20cm closed height on the included wooden stand, this metal helix lets stairwell scale wave propagation experiments amplify the visibility of standing waves.
US$ 423.83
US$ 149.18
US$ 487.99
US$ 85.32
US$ 13.99