Lead-Free Density Blocks With Hooks, Ideal For Studying Density And Specific Heat Without Using Lead. A Block Of Brass, Copper, Aluminum, And Steel Are Included In The Kit Along With A Complete Instruction Manual, Density, Specific Gravity, And Specific Heat
II Launch Pad, Porta-Pad*, with blast deflector and standoff, two-piece 1/8 inch launch rod, safety cap and key, no glue/tools required, Quick assembly,