Why choose Stratum for your next road, gravel, or mountain bike seatpost? It features durable 6066 aluminum construction and comes in all common diameters. It comes in two offset options and features a two-bolt adjustable head to put your saddle right where you want it. Match it with the rest of your Teravail cockpit components for a smart look. Key Features - 6066 aluminum alloy construction with forged alloy head - Two-bolt adjustable head - 400mm length - Available in 27.2mm, 30.9mm, and 31.6mm diameters - Available with 0mm or 18mm offset - Tested to ASTM 3 / ISO MTN