Atlas Filtri Empty Clear Refillable Cartridges for various media types  Our Empty Refillable Filter Cartridges are supplied empty, with a screw cap ready to be filled with your choice of media. They can be re-filled and re-used multiple times making them a more environmentally friendly option compared to single-use media cartridges.Suitable for use with a range of water treatment media such as de-ionising resin, water softening resin, granular activated carbon, polyphosphate, gravel and more. To fit all Atlas Filtri SX  Housings as well as most standard housings available on the market. Both 2.5" and the "Jumbo" size of 4.25"- All SX cartridges now have brand new grey flat gaskets with antimicrobial protection to fight the risk of microbial attack- All refillable and reusable, minimising plastic waste.  TECHNICAL INFORMATION Non-toxic materials, suitable for drinking water.Container, end cap and grid: polypropylene.Flat seal SX: SEBS with antimicrobial technology.Nomin