Two cartridges and one refill bag. Stage 2 is the yellow resin cartridge in the middle of your Complete Home Filtration (CHF) system. You keep it and pour in fresh resin from the bag. About five minutes, no tools. Less plastic. One less cartridge to landfill at every change. Lower cost. Refilling is why the full set is $240 delivered. Premium grade resin. Certified for drinking water (NSF/ANSI 61) and food grade, the same class of resin that sealed softening cartridges use. A new pad is included. Compatible with CHF 15" × 4.5" housings (CHF-6000 and the whole-house side of the CHF-6200). Free delivery Australia wide. Every set includes: Stage 1, sediment cartridge (PW-F-1545C-PP5): sealed polypropylene cartridge, 5 micron. Reduces sand, rust and dirt. Stage 2, resin media refill (PW-M-RES-2500): a 2.5 L resealable bag of resin for the yellow cartridge, which is designed to be refilled rather than thrown away. Reduces the calcium and magnesium behind limescale for noticeably softer water on skin, hair and glassware. One bag is one complete refill. Stage 3, activated carbon block (PW-F-1545C-CTOC5): sealed cartridge, 5 micron. Reduces chlorine, taste and odour. Made for chlorine-disinfected supplies, which includes all of Perth. What's in the box: the two sealed cartridges, the resin bag, a replacement pad for the resin cartridge, a bag for the old resin, the resin refill instruction card and a sachet of food-grade silicone grease for the O-rings. The two sealed cartridges drop straight in and the resin is a quick refill of your existing cartridge. About twenty minutes with the housing wrench and no plumber needed. Step-by-step instructions are included and the full photo guide is on properwater.com.au. Rather not? We change them for you for $100 anywhere in Perth metro. Fitted by CHF owners from Perth to the east coast, in about twenty minutes with the guide. Fit guarantee: if these don't fit your CHF 15" × 4.5" housings on arrival, we'll make it right with a full refund or exchange, no questions asked. Plus a 30-day replacement guarantee. Dispatched in 1 to 2 business days. Your CHF warranty: under Australian Consumer Law a supplier cannot void your warranty simply because you used a compatible third party consumable. Chloramine supplies: some east coast utilities disinfect with chloramine rather than chlorine. Those supplies need a different carbon, so text us before ordering if you are unsure. Not sure if resin or NAC is right for you? Resin (this set): softens water by reducing hardness minerals. Best if you want that soft water feel. Refilled every 6 to 12 months. NAC scale prevention: conditions water so scale is far less able to form, while keeping the minerals in. Lasts around 2 years and low maintenance. Best for set and forget scale protection. Not sure it's your system? Text a photo of your housings to 0452 622 990 and we'll tell you. Compatible aftermarket product by ProperWater. Not manufactured by or affiliated with Complete Home Filtration.