Hegar Dilator Set consists of 8 dilators made of stainless steel and comes in a leather case. Each Dilator has a smooth shaft for comfort while creating intense stimulation and pleasure. Made of body safe stainless steel. We recommend a good quality lubricant is used for easy insertion. Medical play. Urethral. Material Stainless Steel. Features: rounded tip for easy insertion. Non-porous. Hegar dilators provide the option of double ended dilators in even millimeter increments. or from 3 mm to 18 mm e or approximately .118 inch to .708 inch for a greater diameter range over the entire set.