6061-T6 aluminum internally relieved Zero Stack cups and cover to reduce weight High-quality, low friction face seals on the crown races Dependable black oxide, sealed bearings 97g-120g ZS44/28.6|ZS56/40 Black 102g 28.6 44/56 40 40 - 1-1/8 to 1.5`UPC/EAN/GTIN: 840226104546