valve stem caps arrived. 2 had treads and pads to tighten the tire and 2 didn't and were completely unusable. I attach a photo. Very upset with what I received. I plan to see if there is a way to contact the seller or Revain to get a replacement. Otherwise what I received is useless and I don't know if I want to try and double up to order another set of 4 hoping to get 2 more usable lids.