Wall-Powered Halogen Ray Box Measurement_Stopwatches & Timers more uniform flame than a

more uniform flame than a standard Bunsen through a top-mounted grid disperser

Heavy-duty cork boring machine cuts precision holes through rubber and cork stoppers for fitting laboratory glassware

Built for drop-precision dispensing

Aluminum 1-inch diameter pendulum bob at 0

Set of eight hexagonal nickel-plated brass weights totaling 500 grams plus three spare hooks in a wooden storage block

Wall-Powered Halogen Ray Box Measurement_Stopwatches & Timers more uniform flame than aWall powered halogen ray box producing convergent parallel rays bright enough to trace in normal classroom light, with a multi slit card delivering one wide beam or 1 3 5 pencil rays.