ConvaTec SUR-FIT® Sterile Loop Ostomy Rod 65mm Sterile For 2-3/4" Flange, For Use with SUR-FIT® Natura®, SUR-FIT® Autolock® and Gentle Touch® Systems ConvaTec SUR-FIT® Loop ostomy rod is designed for external use in loop ostomy surgery. It is sterile package for use with SUR-FIT Natura Autolock and Gentle Touch systems.