5-Material Equal Mass Density Set (Aluminum, Brass, Nylon, Acrylic, PVC) Metal Labware_Metal Bases & Rods with identical volumes across specimens

with identical volumes across specimens for direct mass-density comparison

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

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

Turning the hand crank walks students through every stage of the 2-stroke gasoline firing cycle on a 14-inch model

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

5-Material Equal Mass Density Set (Aluminum, Brass, Nylon, Acrylic, PVC) Metal Labware_Metal Bases & Rods with identical volumes across specimensEqual 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.