Item Number : 0199129
These seem more durable than the stock ones.
From my understanding and experience, with the conical shape you get a lesser but constant amount of resistance all the way through the turn whereas with the barrel shape, the resistance increases the harder you lean the board heel or toe side.
Conicals make for a better feeling turn IMO, but might more prone to wheelbite.
Being a touch harder than stock medium barrel indy bushings, the resistance is pretty much the same, but distributed differently (if that makes any kind of sense).