I have three seatpost / saddles from Dash. Super light, great addition to a tri bike. Two are for the 2nd gen Trek Speed Concept, and one is for the Cervelo P5 Disc / Px Disc. I have a few saddles as well so first come gets to mix and match which saddle they want with the seatposts.
(1) Cervelo P5 Disc Combo $500
(2) 2nd gen Trek Speed Concept combos (non disc brake version) $350
Pictures here
https://1drv.ms/...rv7f1Epgcjg?e=XCAVMA