Fully automated production ensures consistency whilst maximising the usable surface area of this multi-leaf membrane. The 1.8'' ROM elements repeatedly perform to specification, with flows up to 30% higher than traditionally hand-rolled elements, which are often prone to a high failure rate in-situ. The 1.8'' membranes are a reliable choice for applications from laboratory to residential systems. For use with the ROH-1812 housing and most other 1812 housings.