5-Material Equal Mass Density Set (Aluminum, Brass, Nylon, Acrylic, PVC) Metal Labware_Metal Bases & Rods 101-piece teacher-grade molecular model set

101-piece teacher-grade molecular model set with 51 atoms and 50 bonds covering carbon

Simultaneous AC and DC output on this low-voltage power supply

Half-size digestive system model fits smaller class benches while preserving the full esophagus-to-rectum path and accessory organ anatomy in two removable parts

with identical volumes across specimens for direct mass-density comparison

with adjustable slit and draw-out focusing for examining the spectral composition of light sources

5-Material Equal Mass Density Set (Aluminum, Brass, Nylon, Acrylic, PVC) Metal Labware_Metal Bases & Rods 101-piece teacher-grade molecular model setEqual mass density set in aluminum, brass, nylon, acrylic, and PVC, the shared mass isolating volume and density as the distinguishing variables across metals and polymers.