GXM-600-HF High Flow (HF) to meet your water flow and quality requirements. These GrowoniX, American made, hand rolled membranes are the industries most reliable and highest performing reverse osmosis elements in the world. Advanced membrane technology and manufacturing processes ensure superior quality and unmatchable performance. Ultra low energy design delivers high flow and high rejection at only 80psi. A must for cold water sources. Always at an industry leading 1:1 ratio.