KDF is a specialized purification media that removes heavy metals and makes the purification cartridge bateriostatic GAC is also commonly used for the improvement of taste, colour and odour. Our premium KDF/GAC cartridges contain 40-50% KDF (by weight) which is more than most KDF cartridges from other manufacturers, offering you the best value and quality and ensuring that your water system is optimally effective. Our exclusive CrystaLife mineral mix adds minerals and trace elements back into your water for the best taste and health benefits. Fits most 10" water filter housings What's in the box 1x 10 inch slimline (10x2.5" size) GAC/KDF filter with Crystalife Minerals