Unique Air Service Unit with all the functions of a traditional 2 or 3 piece FRL in a single component package. The units are available in ¼ to ¾ -port sizes in NPTF or ISO G threads with flows up to 105 scfm ( 3000 l/m ). A see-through steel bowl guard offers additional protection for the replaceable polycarbonate bowl. Each unit is furnished with a steel mounting bracket as standard. The COMBI is an excellent choice for applications that require a practical FRL unit where space is at a premium.