Large flyback transformer type BSC24-1125 is great for making powerful high voltage ARCS, high voltage experimentation and high voltage supplies. Has 2 adjustable controls and 10 pin base with 16" long voltage corona wire that has cup on end (made to connect to CRT) and 2 extra high voltage leads. Size about 2.8" tall x 2.3" diameter. Has 10 pins on bottom. Brand new - no specs or hookup information available. Retails for $20.
Note: You should not buy this unless you are familiar with working with high voltages and you should be careful to observe all safety precautions when using this item.