The Two-Piece Fingertight Fitting include a high pressure stainless steel nut and ferrule. The two piece design lets you easily replace just the ferrule instead of the entire set making it an economical choice. It has a 1/4-28 coned port configuration and is for 1/16" OD Tubing
The LiteTouch PEEK Ferrule is specifically designed to be part of a system that helps prevent the twisting of polymer tubing by gripping tubing at two compression points. It can be used with hard tubing material like stainless steel and PEEK preventing the collapse of tubing ID. It is designed for 1/8"OD tubing.