Wooden Test Tube Stand, Standard Light & Optics_Reflection & Refraction Millimeter-graduated 15cm Hooke's-Law scale on

Millimeter-graduated 15cm Hooke's-Law scale on a 30cm support rod

the spare-letter variant in the family with mechanical specs matching the rest of the line

Flask measures 11" tall and has a base diameter of 7"

large enough for whole-class visibility when tracing magnetic field lines around bar magnets

supporting skeletal anatomy teaching in health coursework

Wooden Test Tube Stand, Standard Light & Optics_Reflection & Refraction Millimeter-graduated 15cm Hooke's-Law scale onClip together wooden test tube stand with two 30 mm and four 20 mm holes, assembling quickly for classroom chemistry storage and disassembling flat for easy cleaning.