KX Technologies - MKX-B10-RFL - 10" x 4.5" RFL - 20 Micron - Radial Flow Carbon FilterKX Technologies Filtrex MKX B10 RFL 10" 4. 5" Radial Flow Carbon Filter 20 micron coconut shell GAC carbon block engineered for high flow whole house and well water applications Radial flow design Coconut shell carbon 20,000 gallon capacity 3 GPM flow rate The KX Technologies MKX B10 RFL uses radial flow technology to push water from the outside in, maximizing contact time with coconut shell granular activated carbon while maintaining 3 GPM flow at