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|EC49/40 Black 112g 28.6 44/49 40 - 1-1/8 to 1.5`UPC/EAN/GTIN: 840226077048