Original BMC seatpost for Kaius 01 Gen 1 or compatible frames (Roadmachine Series Gen3 | URS Series Gen1,2 | Twostroke 01 Gen1,2). This item is the exact same configuration as delivered with the Kaius 01 production bikes. It features M5 bolts and hardware. Compatible items featuring M6 bolts and hardware are also available in 0mm, and 15mm offset versions: - 0mm offset, 360mm length (30006247) - 15mm offset, 400mm length (30006270) The 400mm length can be easily cut to fit your exact requirements. This genuine replacement seatpost is supplied complete with saddle clamp hardware (front bolt M5x30mm, rear bolt M5x25mm).