Eureka/Constantan Bare Wire, Model D prop65 covering refraction shapes for a

covering refraction shapes for a complete optics lab kit

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

Greatly magnified transverse monocot stem section on a mounted base exposes scattered vascular bundle layout for advanced plant anatomy coursework

Long-focal double-convex glass lens at 75mm diameter and 500mm focal length

Spring-loaded vinyl jaws open to 2

Eureka/Constantan Bare Wire, Model D prop65 covering refraction shapes for aStable resistance 22 SWG bare constantan wire on a 125g reel, sized for resistance coils and thermocouple legs where copper nickel alloy holds its value across temperature swings.