MK1 1989 > 1998. MK2 1998 > 2005. Alternator Adjuster Block, Mk1 1.8 & All Mk2/2.5. Mk1 1989>1998. Fits all Mk 1.8 models 1993>1998 and all 1.6 & 1.8 Mk2 & 2.5 models, 1998>2005. This is the little spacer that fits at the top so you can adjust the belt tension.
