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Our ROK collection includes the K Naked Portafilter, the ROK conversion kit and the ROK Espresso GC Coffee grinder. The K Naked Portafilter is a bottomless portafilter that lets you get up close to see all the coffee extraction in action. The ROK conversion kit allows you to convert your ROK manual espresso coffee maker to the ROK GC Espresso bringing a whole new experience to the lever press coffee making process. And the ROK Espresso GC Coffee Grinder is a revolutionary grinder that’s easy, fun to use and produces top quality ground coffee. Each coffee grinder comes with a free 250g packet of fresh coffee. Check out more details in the ROK collection below.