The Y is engineered to smoothly work with all curved surfaces, keeping the same distance around curves so that it maintains an even spark. It is a mid-range intensity and interesting shape that spreads the charge out to each one of its ends. The charge travels at high strength to the ends, so using one end will produce a stronger spark than using the curve surface. This can provide for some interesting techniques when used with a violet wand as you alternate between using the Tip and the Curve portions of this electrode. Medical Grade borosilicate glass for strength and safety.