The patented Endoscope Stiffening System (ESS) consists of the Colonoscope Stiffening Device and Enteroscope Stiffening Device.These are reusable devices that provide a simple way to temporarily stiffen the insertion tube of an endoscope during a procedure when difficult anatomy presents itself. They are compatible with Pentax®, Fujinon®, and Olympus® non-variable stiffness endocopes.