A pair of used AP racing 320mm front brake discs
CP3109-1120

This Non-drilled set I would describe as in very good condition

No wear lips present on either disc

and measure as 6mm thick with my Non-digital vernier calipers

To fit the following Yamahas
1998 - 2003 YZF R1
1999 - 2002 YZF R6
1996 - 2002 YZF1000R
1996 - 2004 YZF600R

Note these are 320mm race discs designed to be used with race calipers

and according to AP Racing they are made from a

Special High Grade Iron