Novara aluminum; two-bolt clamp, 27.2mm [10.75" long (273mm); about 3' min insertion]
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http://en.wikipedia.org/wiki/Seatpost
THUDBUSTER
http://www.canecreek.com/products/seatposts
SHORT TRAVEL
http://www.canecreek.com/resources/THUDBUSTER_ST_INSTRUCTIONS_11-2013-v2.pdf
I need: 27.2 mm X 353 mm
LONG TRAVEL
http://www.canecreek.com/resources/THUDBUSTER_LT_INSTRUCTIONS_11-2013-v2.pdf
http://www.jensonusa.com/Cane-Creek-Thudbuster-LT-Seatpost
http://www.jensonusa.com/!OSNq0!gC8DRe9tZYxcEsaw!/Cane-Creek-ST-Thudbuster-Seatpost
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(LT, LT/XL, ST, or ST/XL)
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ADJUSTABLE / DROPPER
http://www.mtbr.com/cat/controls/dropperseatpost/pls_6764crx.aspx
http://enduro-mtb.com/en/review-8-dropper-seatposts-selected-for-testing/
http://flowmountainbike.com/tests/adjustable-seatposts-three-way-test-crankbrothers-kronolog-fox-d-o-s-s-rockshox-reverb/
http://www.chainreactioncycles.com/us/en/rockshox-reverb-seatpost/rp-prod84856?utm_source=Google&utm_medium=Shopping&utm_name=UnitedStates&gs=1&gclid=Cj0KEQjw3vyeBRDt673h5ZTYrdQBEiQAzhkf8g5dgRUjlN50FrPCTDQTZ2E6MTpQanzNyo_G7rP4_q0aAoD68P8HAQ&gclsrc=aw.ds
http://www.bikemag.com/gear/reviewed-dropper-posts/
http://spokemagazine.com/2013/09/09/why-you-should-have-a-dropper-seatpost/