The Specialized Command Post IRCC Dropper Seatpost comes with Cruiser Control technology which gives you ten micro-adjust positions so youll always be able to find just the right saddle height for descending or climbing. The mechanical locking system on the Command Post is unique to Specialized & comes with durable internal seals to ensure long term durability. The Command Post IRCC is available in 3 lengths of travel between 75mm & 125mm & comes complete with bar mounted lever. Features Patented mechanical locking system with the addition of Cruiser Control Technology. Cruiser Control technology features added positions in the cruiser control range. Bonded lightweight aluminium micro-adjustable "alien" style head. Dual-keyway system eliminates saddle wiggle. Energized triple-lip wiper prevents contamination. Durable zero-gap, dual-lip x-ring internal seal ensures long-term durability. 30.9mm seat post diameter. Three lengths of travel: 75mm, 100mm, 125mm Ships with SRL & grip mounted lever.