Inlet/Outlet Connections. 13 mm: Female luer lok inlet, minispike outlet; 25 mm PSF: Female luer lok inlet, male slip luer outlet; Typical Hold-up Volume(with air purge) 13 mm: < 14 µL; 25 mm PSF: < 125 µL; 25 mm PSF GxF: < 200 µL; Maximum Operating Temperature. 25 mm PSF: 55 ºC (131 ºF) at 2.1 bar (210 kPa, 30 psi) Maximum Operating Pressure