Color Changing Deionization DI Resin, from Blue to Amber when the resin exhausts. Prevents Guesswork so you know when to change it. Less waste due to changing before it's actually needed. 1.25 Lbs Enough to fill one standard 10" Cartridge, it uses Cation and Anion media to reduce Total Dissolved Solids (TDS) to zero in the last stage of an RO/DI unit. For Ultra Pure TDS Free Water All Units are in Strong Mylar Bags and Heat Sealed to maintain highest absorbency and shelf life. Use with any manufacturer’s refillable 10” cartridge’s much more economical than throwaway cartridges. 100% Virgin Mixed Bed DI exchange resin, no regenerated resin here, only premium, new, quality resin that meets our highest standards. Awesome Aquatic Mixed Bed DI Resin Resintech MBD-30 Nuclear Grade Color Changing DI Resin Deionization RO/DI 10" Filter Cartridge Refill Color Changing Deionization DI Resin, from Blue to Amber when the resin exhausts. Prevents Guesswork so you know when to change it. Less waste due to changing before it's actually needed. 1.25 Lbs Enough to fill one standard 10" Cartridge, it uses Cation and Anion media to reduce Total Dissolved Solids (TDS) to zero in the last stage of an RO/DI unit. For Ultra Pure TDS Free Water All Units are in Strong Mylar Bags and Heat Sealed to maintain highest absorbency and shelf life. Use with any manufacturer’s refillable 10” cartridge’s much more economical than throwaway cartridges. 100% Virgin Mixed Bed DI exchange resin, no regenerated resin here, only premium, new, quality resin that meets our highest standards. ResinTech MBD-30 is a 1:1 volumetric mixture of CG8-H (an amber-colored hydrogen form cation resin) and SBG1P-OH-ID (a dyed hydroxide form type 1 porous strong base anion resin). The anion component is infused with a permanent pH indicator dye that changes color from blue to amber as the resin exhausts. MBD-30 is intended for use in cartridge applications where a color indication of resin exhaustion is desired.