WHISKY No.7 Carbon Seatpost - 30.9 x 400mm 0mm Offset Matte CarbonWHISKY No. 7 Carbon Seatpost 30. 9 x 400mm 0mm Offset Matte Carbon. The No. 7 Carbon seatposts are made from the highest quality materials to be durable lightweight and comfortable. Whether youre remounting during the cross race or abusing them on the trail you can trust Whiskys seatposts. Available in most common diameters with non offset or 18mm offset options. Unidirectional carbon shaft forged aluminum head Two bolt adjustable head 400mm length No