Separate from being in the seat post , held in your hand, you can feel the various densities
they manufacture for their seat posts.

Or at least I can .. like the feel of a Rare, red meat, vs Well Done, cooked through, Steak.

LT you have color codes , ST they are all black But there is a clock face like number with a pointer

they change what number it is , by the arrow position .. Seatposts

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