9-Piece Brass Hooked Weight Set, 10-1000g, with Wooden Block Lab Supplies_Weights & Masses illustrating the high-ratio speed reduction

illustrating the high-ratio speed reduction and self-locking action of worm gearing

semi-circles

letting students rub one half against the same cloth and compare insulator and conductor behavior in triboelectric charging

Front glass window slides up to allow insertion of ionizing material in chamber

Open-mount electromagnet bell on an 8x4-inch wooden base with a push button and 4mm banana sockets

9-Piece Brass Hooked Weight Set, 10-1000g, with Wooden Block Lab Supplies_Weights & Masses illustrating the high-ratio speed reductionNine piece hooked weight set with seven polished brass and two powder coated steel masses spanning 10 to 1000 grams, stored in a 7. 75 by 3. 75 by 3 inch wooden block for physics coursework.