Genuine Grimac group head gasket. Size 73 x 57 x 8mm. Other sizes available.
Used in the following models:
ECLISSE, G10, G105, LA-UNO, MIA, TEN, TWENTY, ZOLA-I, ZOLA-II
More Grimac Mia spare parts are listed here:
Using a group head brush helps to maintain the gasket from excessive wear and keeps stale coffee grounds from infecting freshly extracted shots of espresso.