Small Round Solid Ring. With an 8.5″ (21.6cm) Inner Diameter, this is the smallest and most versatile of the 3 solid, round rings shown in the photo. The small ring can be used in small abdominal incisions, adolescent surgery, perineal and vaginal procedures.

Medium Round Solid Ring. With a 10.5″ (26.7cm) Inner Diameter, this is the most popular of the 3 solid, round rings shown in the photo. The medium ring is can be used in a wide range of procedures.

Large Round Solid Ring. With a 12.5″ (31.8cm) Inner Diameter, this is the largest of the 3 solid, round rings shown in the photo. The large ring is typically used in long incision abdominal procedures where great exposure is required.