O-ring seal DRILASTIC 104x2mm

O-ring seal from Drilastic.
What are they used for? Among other things, these sealing rings fit on the top of cylinder liners of various Porsche 996 and 997 models and seal the liner on the liner carrier against coolant in the area of the head gasket.
Dimensions:

D= 104mm

Cord thickness= 2mm

2001-2005 Porsche 996 Turbo / GT2
2007-2009 Porsche 997.1 Turbo / GT2
2010-2013 Porsche 997 GT2RS (9770)
2003-2005 Porsche 996 GT3 3.6 and 3.8L (9676, 9679)
2007-2011 Porsche 997 GT3 3.6, 3.8 and 4.0 (9776, 9777, 9774)