Soda Lime Glass Desiccator Physics plus locking bearing pins and

plus locking bearing pins and hooks for building varied compound pulley configurations

this single large lump of genuine American coal ships in a cotton drawstring bag with a linked science-experiment activity

25-inch gear train simple-machine model arrives ready to use with no assembly required

Autocatalysis demonstration kit reveals reaction mechanisms where products catalyze their own formation through visual chemical kinetics experiments

mounted on casted base

Soda Lime Glass Desiccator Physics plus locking bearing pins andSoda lime glass desiccator with a ground glass lid provides a moisture controlled chamber for drying and storing hygroscopic chemicals, reagents, and samples.