Giant Connect SL Composite Seatpost features a spiral wound unidirectional composite shaft bonded to alloy head with reversible outer clamp pieces for offset between 12 & 23mm.- Spiral wound unidirectional composite shaft bonded to alloy head- Reversible outer clamp pieces for offset between 12 & 23mm- 275g for 30.9 x 370mm length Sizes 370mm x 30.9mm