5.75" Cast Iron Ring with Open Boss Head Clamp and Thumb Screw Included_Rod & Base Plastic-bodied wave apparatus with eccentric

Plastic-bodied wave apparatus with eccentric discs that drive metal rods up and down as the handle turns

Twelve-position substitution box rotating through 100 ohms to 470k ohms at 1W and plus-or-minus 1%

Four-socket E10 lamp holder pre-wired in series on a hard-plastic base with two 4mm banana terminals

surface tension

5.75" Cast Iron Ring with Open Boss Head Clamp and Thumb Screw Included_Rod & Base Plastic-bodied wave apparatus with eccentricOpen ring design in cast iron pairs with an integrated open boss head, combining a 5. 125 inch inner diameter with a rod grip up to 5 8 inch for larger flasks on a retort stand.