We needed a fitting that had partially broken and were pleasantly suprised that they suggested to purchase the adaptor, but sent us the original end piece we needed.
We have 2 med/large dogs and bought the 1.2metre high, 5 x 2 metres. The dogs were kept safe, it gave us privacy and was easy to set up and take down. Only criticism is the adhesive clips for the mesh skirt. They are useless and fall off straight away. We will screw some studs onto the van as shown in YouTube videos.
We have had these for a year or so now, and they keep the dogs happy and safe when we are camping. Easy to put up, and easily modified to suit the best outcome and location. They are pretty pricey, but worth every penny.