BALLET STERILE DISPOSABLE ELECTROLYSIS NEEDLES. The Ballet needle is manufactured with both a precise point and a mirror-like surface polish. The rounded tapered point of the needle will assist the electrologist in locating the follicle opening and upon insertion the needle will slide smoothly and accurately to the base of the follicle. • K2 needle - 0.055 mm (0.002”) • Insulates needles: suggested for patients with high sensitivity to disconforts of electrolisys.