Spark plug, W8AC / WR8AC+, 1200-1600 (BOSCH)
These are high quality items made by the Original German OEM parts manufacturer Bosch. They are the Bosch Super spark plugs with a copper core, as used on 1200c to 1600cc T1 engines, and are suitable for Beetle, Buggy, Ghia and Bus.
The thread length on these plugs is 11mm.
Please note: The majority of ignition leads for VW engines, are intended to not use the "screw on cap" that is supplied with Bosch spark plugs.
If your leads do not fit onto your new spark plugs, simply remove the "screw on cap" from the spark plug, and the leads will slide onto, and grip onto, the threaded pin on the top of the plug. This is normal.