Alnico Cylindrical Magnet, 37 x 9mm Material_Copper Five-pulley set of tandem low-friction

Five-pulley set of tandem low-friction plastic pulleys at 25

Wooden wheel-and-axle simple-machine model on a 9

this magnified animal cell model reveals organelle ultrastructure and cellular organization for advanced biology instruction

Hooke's Law

this cast double burette clamp secures two burettes side by side for back-titration and comparative analytical procedures

Alnico Cylindrical Magnet, 37 x 9mm Material_Copper Five-pulley set of tandem low-frictionPink dots mark opposing poles on this 37 x 9mm Alnico cylinder pair, supplied with steel keepers and a cardboard storage box for sustained field strength between hands on experiments.