Dear Norman,Good day !For the normal Value, basically we still hope to according to regulation of CBSA by import small amount of subject goods firstly, then CBSA will assess anti-dumping duties equal to 170% of the export price, and will re-do dumping questionnaire to the exporter (and manufacturer, if applicable). If specific normal values are issued by the CBSA, the CBSA would use the specific normal values to process the appeals and issue refunds, if applicable, of anti-dumping duties paid. This is the best solution to avoid any problem when export and customs clearance.Since you are preparing to sell to Canada already, we may try to modify the documents by metonymy after shipping. That’s mean though we don’t have actual normal value on roofing screw, will use the similar item to instead to solve the problem temporarily to avoid the 170% anti-dumping fee. Enclose you can find the list.Anyway, that is still not a permanent solution, just can settle a pressing need. We hope to appeal to new normal value on roofing screw officially and need your help to work cooperation together.