PFA high purity (HP) tubing offers all of the benefits of Standard PFA tubing, but is contaminant free. Designed for chemical environments where purity in the parts per billion is needed. PFA Plus tubing is availabe in 1/4" od to 1/16" od. The tubing has increased ability to with stand repeated flexing and improved resistance to stress cracking when exposed to aggressive fluorosurfactants. It also offers a more chemically stable polymer chain end-capping functional group, minimizing interaction of this polymer wit ionich species. Tubing made with PFA ,HP offeres even smoother clearer walls than the standard PFA HP.