Aluminium sealing washer 18x24x1.5mm.

To fit:
911 1978-1989 Used to seal the oil pressure relief spring
924 1976-1988 Used on the temperature sender, in the oil cooler lines to seal and for the oil sump plug on 1986-1991 models
944 1982-1995 Used as a sealing washer on the sump plug and to seal the back up light sender on 1989-1995
911 (964) 1989-1994 Used as a sump plug sealing ring and in the intercooler on turbo models
911 (993) 1994-1998 Used as a sump plug sealing ring, and for the pressure transmitter on the intake manifold
Boxster (986) 1997-2004 Used as a sump plug sealing washer
Boxster (987) 2005-2012 Used as a sump plug sealing washer
Cayman (987C) 2006-2012 Used as a sump plug sealing washer
911 (996) 1998-2005 Used as a sump plug sealing washer
911 (997) 2005-2012 Used as a sump plug sealing washer