Aluminium finned rocker box oil feed, with the oil feed in the centre on te back face of the oil feed. This has 5 fins and is 1 1/8 inches (30mm) deep. The hole entres are at 5 1/8 inches (130 mm). It is suitable forTriumph 650cc and 750cc twin cylinder engines - 6T. T100 pre-unit, T110, T120, TR6 and T140, TR7.