The Sample Loops fit in the Reagents Module (2101308) and allow reagents (or solvents) to be added in-line, rather than being pumped through the pumps. 

In this mode, solvents pumped from the FRX Pumps push the reagents out of the Sample Loops and into the reactor. Sample Loops are available in 1ml, 5ml or 10ml. All the wetted parts are PTFE tube.