Dialysis Tubing, 32mm Width, 10 Feet Base Size_6 x 9" this demo motor on a

this demo motor on a molded ABS base operates at 6-8V to demonstrate visible-spectrum color mixing

the half-disc geometry letting light enter perpendicularly through the curved face for Snell's law and TIR ray-tracing experiments

Metamorphic rocks containing different rock specimens supplied in carboard box

supplied for repeated use in osmosis and selective-transport demonstrations in biology and chemistry classes

Dialysis Tubing, 32mm Width, 10 Feet Base Size_6 x 9" this demo motor on aUsed in osmosis and dialysis experiments, this roll of 12 14 kDa cutoff dialysis tubing lets students explore selective molecular transport across a semipermeable membrane.