Orthoflex

I recently tried an Orth-flex roping saddle on my horse and it fit beautifully. The saddle is marked with WT-182 16. I’m sure it is out of my price range but I was wondering if anyone knew what that designation means. The new orth-flex wasn’t able to help me. I assume 16 is seat size…WT=wide tree?? 182=??? any ideas?