6" Trocar for Large Animal Surgery - 7 Gauge, with a semi-blunt 45° Beveled Tip. Subcutaneous tunneling needles (trocars) offer a quick and easy method for routing catheters and electrodes under the skin. SAI's TRO-7-6 is manufactured from thick-walled medical-grade stainless steel, has a semi-blunt tip and is ideal for large animal surgery. Customized tips and lengths are available, please contact us for more information. 7G, 6 in. Product is for laboratory animal research only.