Get current pricing for Marlo, MRO-10800-4H-LP Marlo Mro-4h Ro System Rated At 7.5 Gpm. Ro Features Six Wave Cyber 300e-4 300 Psi Vessels Configured In A 2:2:1:1 Array. Unit Has A 2-inch Prefilter . Product Category: Process Equipment, Sub Category: Reverse Osmosis Equipment: