The 7 1/8 Ochsner dissector D/E 3mm 4mm is a specialized surgical instrument, commonly used in various surgical procedures, particularly in vascular and abdominal surgeries. It is designed with two different-sized tips: one measuring 3mm and the other 4mm, allowing for versatile dissection in different tissue types and areas. The Ochsner dissector is known for its robust construction and precise control, with a double-ended (D/E) design that provides a choice of tips depending on the specific needs of the surgery.