4-Stroke Gasoline Hand-Crank Engine Model, 13.75" Science at Home_Life Science 25 inches tall with five

25 inches tall with five 4

these concavity microscope slides hold liquid samples for hanging-drop preparations and observation of specimens in suspension

Six-piece polypropylene beaker set spans 50mL to 2000mL for complete classroom and lab volumetric workflows without glass breakage risk

a compound unit for demonstrating multi-rope mechanical advantage in physics activities

4-Stroke Gasoline Hand-Crank Engine Model, 13.75" Science at Home_Life Science 25 inches tall with fiveHand cranked 4 stroke gasoline engine model at 13. 75 inches tall with visible crankshaft, camshaft, valves, rocker arms, push rods, and an ignition light that fires on compression.