The KONE Coffee Filter is a stainless steel filter that allows all of the good coffee oils to pass through but the holes are too small for sediment to get into your drink. Keith at Able Brewing has spent years prototyping and developing the KONE filter with over 40 iterations and two previous production models all in the pursuit of great coffee. The result of all that work is a stainless steel filter that’s been engineered down to the patterns and micrometers between each hole. Not only is it a marvel of coffee engineering, the KONE is designed and manufactured in the USA with incredibly high quality standards. This is an optional add on for $45.99 more.