Raw Calcite Mineral Hand Sample, Approx 3 inch Chemical_Methylene Blue and transistors for building astable

and transistors for building astable multivibrators

Compact 150mm black 4mm-stackable lead with nickel-plated split-hollow pins

sized for 20 to 22 mm tubes and resistant to lab reagent splashes on classroom benches

(1) IS7004 endothermic demo kit (1) IS7005 exothermic demo kit Instructions and safety data sheet (SDS) packet

Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515 °C | Annealing Point 565 °C | Softening Point 820 °C

Raw Calcite Mineral Hand Sample, Approx 3 inch Chemical_Methylene Blue and transistors for building astableBuilt for carbonate mineral teaching, this 3 inch raw calcite hand sample reveals rhombohedral cleavage and Mohs 3 hardness for identification practice.