You can't backflush too often. Regular backflushing helps keep your espresso machine clean and in great condition. The stainless steel 58mm backflush disk fits all portafilters used in conjunction with E61 groups. It also fits many other 58 mm portafilters.
What sets Clive Coffee apart is that they are all about customer support! Anyone can sell hardware but they truly provide after-sale support backed by their own personal experience!