IMS 54mm Nanotech Filter Basket Complete with a nanotech coating designed to prevent coffee sticking, these IMS precision baskets fit 54mm portafilters, as seen on most Breville & Solis espresso machines. Their slight cylindrical shape helps to create a more compact puck and improves extraction overall. Each basket has 583 0.3mm holes arranged in a hexagonal pattern that balances the delivery of coffee given the overall shape and size of the filter basket. NOTE: the electropolished coating on these baskets is not compatible with CAFIZA and other cleaning agents. To avoid stripping the coating, only wash by hand using non-abrasive cleaners and gentle dish soap. 583 holes, 0.3mm each, arranged in hexagonal hole pattern for a balanced delivery of coffee. IMS 54mm Precision Nanotech Filter Baskets are available in the following sizes: Height Capacity Suggested Dose Light Roast Medium Roast Dark Roast 22mm 12–16 g 14–16g 13–15g 12–14.5g 24mm 14–20g 17.5–20g 15.5–18g 14–17g 26mm 17–20.5g 18–20.5g 17–21g 17–19.5g 28mm 18–23g 20–23g 18.5–22.5g 18–22g