US$ 285.00
dual bore sights
using wide-pad threaded metal screws for secure fastening
Used to keep the slide-wire wiper out of student reach during high-voltage work
Ten-centimeter brass cone on an ebonite insulator and metal base
1100-turn copper coil on a bobbin sized for a double C-core
Large Steel Compression Spring Stock Type_Build to Order dual bore sightsTwelve inch steel compression spring with a 0. 050 N mm constant and 19 SWG wire, sized for large scale demonstrations of elastic potential energy and simple harmonic motion.