Single Pulley with 2 Hooks, Heavy Duty Frame, 4.25 x 2" Manufacturer_Austerlitz and C' 512Hz - a

and C' 512Hz - a major-chord array struck with the included hammer to amplify intervals and harmony

supplying a contrasting reactive-metal electrode pair for Faraday's-laws and ionic-conduction work

supplying replacements when the originals lose loft or split during repeated charging cycles

EDM-80 moving-coil DC voltmeter with a clear acrylic front

Variety pack to help with experiment of contrasting resistances and temperature

Single Pulley with 2 Hooks, Heavy Duty Frame, 4.25 x 2" Manufacturer_Austerlitz and C' 512Hz - aAluminum bodied single pulley in a heavy duty 4. 25 inch metal frame with hooks at both ends and a centered 2 inch wheel, configurable as fixed or movable in compound setups.