The Nukeproof Neutron AM Stem is cold-forged from high-grade 6061 aluminium for optimum strength. It features extensive CNC machining to shave off excess material and is specifically built to tackle the gnarliest of DH trails while staying light enough for all-round trail riding.Ultimate Strength and StiffnessNukeproof has redesigned the four-bolt faceplate system to shave some weight whilst retaining strength, which offers maximum security against bar slippage. The ultra-wide clamping area provides exceptional stiffness and security, and the low stack height provides more cockpit tuning possibilities.Key Features:Material: 6061 Alloy,Stack Height: 40mm,Weight: 185g.