Used for about a year before switching to heavier load springs due to the addition of a full metal rear bumper.
Per Dobinson, specs are: 200-400LB heavy rear load weight, 2" lift, 2.5" with stock weight. 410/410mm, 18mm wire, 271LB
Ran these with hitch mounted spare tire carrier with full size 35" spare, sliders, roof rack, rtt and they were perfect
$150 firm
Local pickup only for now, no shipping