3t ionic 0 pro aluminium seatpillar the 3t ionic 0 pro aluminium seatpillar has a shot peened black anodized finish it is an all new design featuring 3ts difflock seat clamp the difflock coupling is a highly accurate method of setting saddle angle needing only lightweight clamping by side mounted bolts and is especially useful for fine adjustment of saddle setback which can be done without impacting saddle angle the seat clamp assembly is in line with the seatpost for zero setback