Milton’s 1/4" FRL Modular End Block (S-1163-59C): Used to connect supply air to a FRL system, this modular can be used for both the inlet and outlet side of the air supply. No need to unthread multiple pipe connections in order to service or assemble/disassemble. 1/4" NPT: Connects to hard piping. 1/4" unthreaded end: Connects to modular connector. This FRL component has a temperature range between 25°F and 140°F or -5°C and 60°C.
Abbott Rubber Technical Data Sheet