This competition filter basket is made by IMS but with Barista Pro brand and is slightly different to the IMS:
This baristapro has 20 more holes 661 holes, (IMS have 641) and the edge is 2mm more 70mm (IMS has 68mm edge) - the same as the Nanotech versions.
non-stick NANOQUARTZ coating, increases the resistance to corrosion and to chemical reaction. middle hole 5.5 mm - 98 holes o 3 mm. Aisi 316 steel- food-safe certified integrated membrane 200 µm suitable for machines BEZZERA-MAGISTER-PAVONI, PROMAC-RANCILIO