Hellbender 70 Slam is a premium headset for riders looking to lower their handlebar position as much as possible. Slam uses an ultra-low stack bearing cover to allow riders to set up a low/aerodynamic position or to accommodate for a short fork steerer tube. 

Features
Stack Height: ZS—2mm top; IS—4.6mm top
Material: 6061 T-6 aluminum, internally contoured and relieved to minimize weight and maximize strength
Top Cover: Designed with the lowest stack height possible
Crown Race: Alloy dual-seal crown race
Bearings: Sealed stainless-steel Hellbender bearings

Specifications
Cups & Covers: 6061 T-6 aluminum, internally contoured and relieved to minimize weight and maximize strength
Top Cover: Designed with the lowest stack height possible for both IS and ZS
Crown Race: Alloy Dual-Seal crown race provides excellent seal efficiency with low friction
Compression Ring: Carbon-friendly captured compression ring
Bearings: Premium, sealed stainless-steel Hellbender bearings

Mfr Claimed Weight
TBC