The standard upper burr has a flat side (SP0001801) lower burr to match is (SP0008611). They are also not interchangeable, so a Standard burr will not fit a machine with an Etzinger burr fitted or the other way round.
Genuine Sage PRECISION BURR KIT LOWER - SP0008611 or SP0025560
Genuine Sage Burr Kit Upper ETZINGER - SP0027464
Genuine Sage - STEAM PROBES with latest gen Black O-RINGS - SP0109383
Genuine Sage - NTC BASE KIT - BES500- SP0024796
Genuine Sage - COFFEE PUMP -SP0020015
GENUINE SAGE - TRIAC PCB - BES990- Oracle Touch -SP0020524
