RGB/CMY Mounted Color Filter Set, 50 x 50mm, 6-Piece Racks & Stands_Flask Stands tightened with an Allen wrench

tightened with an Allen wrench for constructing lattice frameworks on laboratory benches

Speed-controlled 6V motor driving two cams pumps four spring-mass systems at any chosen frequency

Rotary-knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections

this metal wave apparatus pairs the rotary handle with a degree scale so students can read phase against vertical displacement

and physics principles in classroom investigations

RGB/CMY Mounted Color Filter Set, 50 x 50mm, 6-Piece Racks & Stands_Flask Stands tightened with an Allen wrenchThree primaries (red, blue, green) and three secondaries (cyan, magenta, yellow) sit in 50 x 50mm mounts, supporting both additive and subtractive color demonstrations in optical box setups.