Two-Sided Boss Head Clamp, Painted Die-Cast, up to 19mm Rods Pack Size_Single 4 GHz bidirectional RF clicker

4 GHz bidirectional RF clicker pairs students and educators with a private help-request feature for discreet in-class support

Diamond lattice kit with 39 carbon atoms and 60 connectors for building the tetrahedral covalent network that gives diamond its exceptional hardness and optical properties

Two pith balls suspended on unspun silk from a brass pillar

3125 inches across

sized for physics force experiments and balance calibration in classroom laboratory sessions

Two-Sided Boss Head Clamp, Painted Die-Cast, up to 19mm Rods Pack Size_Single 4 GHz bidirectional RF clickerHeavy duty die cast alloy boss head with a painted gray finish and two adjustable thumbscrews, accepting rods up to 19 mm in diameter for larger retort stand assemblies.