The used pair came on the front of my car with wheels I didn't use. They measure 1.01", and bolt on with flat flanged nuts as shown.
The new pair actually measure .990", and bolt on with 60 degree taper nuts as shown. They came with wheels but I did not need them for my car.
$65 per set including shipping (lower 48) and all the proper mounting nuts.
If you buy both sets, I will include the nearly full set of alloy wheel nuts (18 plus 2 standard open-end) that use the most common radius taper to the wheels. My new wheels don't use these.