The Cane Creek Hellbender 70 - IS41/28.6|IS52/40 is a headset designed to bridge the gap between the 40-series and 110-series headsets. It boasts all the design characteristics, sealing element, and Hellbender bearing found on a 110-series headset, at a price closer to a 40-series.This headset is machined from 6061 T-6 aluminium, ensuring durability and strength. It features an alloy dual seal crown race and premium Hellbender bearings with low-friction seals. These high-quality components provide a smooth and reliable performance.The Hellbender 70 is also compatible with Interlok spacers. This allows for easy customization and adjustment to achieve the perfect fit.Internally, the parts of this headset are cross-compatible across the 10, 40, and 110-series. This means that you can easily upgrade or exchange parts as needed, ensuring compatibility with a range of frames and setups.The upper stack measures 9mm (Short), while the lower stack measures 1mm. This provides a versatile fit for various bike configurations.The weight of this headset is to be confirmed. This information will be provided before purchase, allowing you to make an informed decision.Cane Creek stands behind the quality of their products and offers a 1-year warranty on this Hellbender 70 headset (excluding bearings). This provides peace of mind and assurance that you are investing in a reliable and long-lasting product.