#4C Rumen Cannula similar to the #2C rumen cannula except for a 3 inch (7.5 cm) center diameter. This cannula usually has blemishes that do not affect its use. Stopper included.
Many researchers use this cannula just after surgery for a 4 inch fistula. The #4C has a 3 inch diameter and will reduce pressure on the surgery site. After the animal heals (10 - 14 days), replace the #4C with a 1C, 2C, 3C or 9C.