Steel Cylinder Hooked Weight Set Chemical_Active Dry Yeast and a spring-loaded clip to

and a spring-loaded clip to grip a diffraction grating on the PH0619 spectrometer

Solid sphere with a small ring for suspension

sized to grip rod or foil electrodes at fixed spacing for repeatable electrolysis and electrochemical-cell setups

and Newton's-second-law apparatus in mechanics experiments

Frog dissection model with English keycard reveals internal structures and organ identification for amphibian anatomy instruction

Steel Cylinder Hooked Weight Set Chemical_Active Dry Yeast and a spring-loaded clip toCoordinated mass set of cylindrical weights with integral hooks supports spring scale calibration and systematic physics experiments on force, gravity, and pulleys.