These bearings are built to live in the most extreme conditions, keeping you riding smoothly through rain, mud, grit or whatever the road and trail throws at you Using stainless steel bearings with increased sealing elements and more grease in relation to the comparable 110 bearing Hellbender HD 1.5` 36/45 Sealed Cartridge 40mm 52mm 6.5mmUPC/EAN/GTIN: 840226078144