Mazzer Mini Electronic Grinder Burrs (Pair) ø 64x37x8.4mm - FMA00189D  $24.98

These are great and fit perfectly in spite of being a cheaper OEM. It is the first time I have changed the burrs since buying my second hand grinder. They have taken a while to "run in" but seem to produce a much better grind now, with less clumping in particular. Recommended.