Hegar Uterine Dilator, single-ended, 18.5 cm (7 1/4") with a 1.5 mm diameter is a confirmed and standard reusable gynecological instrument. Multiple medical suppliers list this exact specification as an in-stock item.

The 1.5 mm diameter is a "micro-fine" size, specifically designed for the initial stage of gentle cervical dilation, particularly in narrow cervical conditions or pediatric procedures.