Saco Billet pulleys are Billet aluminum, with a chromoly center hub. Pulleys are hard anodized black for wear, and have numbers and timing marks laser engraved. All Saco engine pulleys come with sand seal. Requires the use of a longer pulley bolt, part number 30-1132. (Note: If used with non-machined case, you must use part number 30-1126 also) 30-0114