IMS Filter Basket

The convex base is engineered to direct water flow toward the center of the coffee puck. This helps prevent channeling along the edges and promotes a more uniform extraction, which typically results in a cleaner, more balanced cup.

Yes, this basket is designed for standard 58mm portafilters and features a 70mm external diameter (B70). It is compatible with most professional-style machines, though you should ensure your portafilter has enough clearance for the specific height of the basket you choose.

Bottomless portafilters expose the entire underside of the basket, making it easy to spot uneven extraction or channeling. Because the IMS convex basket is designed for precision, it performs best when you can visually monitor the flow to dial in your grind and distribution technique.

The height you choose should correspond to your preferred dose. For example, the 20mm basket is best for 10-15g doses, while the 28.5mm basket is designed for larger 20-22g doses. Selecting the right size ensures the coffee bed has the correct headspace for optimal pressure.

Yes, for the best results, you should use a tamper between 58mm and 58.5mm. A precision-fit tamper ensures that the coffee grounds are compressed evenly across the entire surface of the convex base.

The basket features an electropolished stainless steel surface, which is naturally resistant to coffee oil buildup. You can keep it clean by rinsing it with hot water after each use and performing a regular backflush or soak in a coffee-safe detergent to maintain the integrity of the 715 precision holes.