Upchurch Scientific's PEEK Tees and Crosses include high pressure F-300 PEEK Fingertight Fittings - allowing maximum operating pressures to 3,500 psi (241 bar) when used with 1/16" OD PEEK, titanium or stainless steel tubing. They can also operate in lower pressure applications using fluoropolymer (e.g. FEP, PFA, ETFE) tubing.