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|EC44/40 Black 120g 28.6 44/44 40 20 - 1-1/8` to 1.5`UPC/EAN/GTIN: 840226116600