Water gallery core plug, 25mm.
Mk2 Golf - Used in the cylinder head on 1.6-1.8 including diesel
Mk3 Golf - Used in the cylinder head on 1.6-2.0 including 1.9 diesel
T25 - Used in the cylinder block and cylinder head on 1.6 and 1.7 diesel
T5 - Used in the cylinder head on TDI models
Used as original or as oversize replacement for N01-191-42 (24mm)