Empi 33-1065 Laser Engraved Black Anodized Bolt On Sand Seal Stock Size Aluminum Degree Crankshaft Pulley With Holes For Air-cooled Vw Engines. Black Anodized With Laser Engraved Timing Marks & Numbers. This Pulley Offers Better Timing Light Accuracy When Tuning Vw Engines. ( Outer Diameter 6 3/4" ) Use With Extra Long Pulley Bolt.