RGB/CMY Mounted Color Filter Set, 50 x 50mm, 6-Piece Racks & Stands_Flask Stands 75-inch height range for bench

75-inch height range for bench apparatus

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

the flywheel light enough to drive by breath for hands-on reciprocating-engine study

Polished beech wood test tube rack with twelve vertical holes sized for tubes up to 28 mm diameter

this Brownlee-pattern apparatus gives a clean visual proof of the 2:1 stoichiometry of water decomposition

RGB/CMY Mounted Color Filter Set, 50 x 50mm, 6-Piece Racks & Stands_Flask Stands 75-inch height range for benchThree 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.