Closed Retort Ring with Stem, 5.9" ID, Plated Mild Steel Material_Bristle and a six-turn thick coil

and a six-turn thick coil for hands-on Lenz's law and induction-heating work

Sprung-tip jockey contact slides smoothly along the resistance wire of a Wheatstone bridge or potentiometer to find the null-deflection balance point during student-built bridge experiments

Long-format 150mm-length equilateral acrylic prism with 25mm faces

Spring-loaded heavy-gauge steel projectile launcher with a string-release trigger

Closed Retort Ring with Stem, 5.9" ID, Plated Mild Steel Material_Bristle and a six-turn thick coilPlated mild steel closed retort ring with a 5. 9 inch inner diameter and 5. 5 inch stem, sized for large flasks and funnels held over heat sources in chemistry setups.