The Cheminert Perifit™ is a unique fitting with a barb on one end and a 1/4-28 female fitting on the other, for connecting a FIA line with the most commonly used peristaltic tubing. The fitting is compact and easy to install while providing a secure, trouble-free connection. A Perifit can be used as a "stop" on standard inexpensive Tygon® tubing, eliminating the need to buy the more expensive pre-cut tubing with pre-installed stops.

Unlike many competitive systems, Perifits are reusable as the tubing wears. Three sizes of Perifits are available to cover the range of tubing most commonly used in FIA.