PEEK coupler for connecting a guard and analytical column. Consists of a short length of pre-cut tubing (2.8" long x 0.010" ID) with 2 PEEK nuts and ferrules for 10-32 coned ports. Swept volume of 3.6 µL for minimal peak dispersion. Recommended for PEEK-body IC columns and any column (up to 250mm length) and guard installed in the CTO-40S. Maximum pressure 5,000 psi (345 bar.) Not recommended for a 250mm column and guard installed in the CTO-20A/AC or CTO-40C due to the extended length of the guard column and coupler. Do not use with mobile phases containing THF.