I’m a prospector from the gold fields in Western Australia I have designed and building a large gold dry blower (washer) I wanted the best riffle trays I could get to recover at least 90% of the gold out of soil I ran through my machine they also had to be well made to handle the rough work they have to do. After a lot of research looking all over the world I come across Royal Manufacturing Industries, I’m so glad I did because I couldn’t believe the fantastic and prompt costumer service I received from them after 3 weeks of emails backward and forwards I finally had the trays and recovery boxes shipped over and now I have them and after the research I had done on all other trays I can confidently say that they are the best well made trays in the world. Thanks Millie for the great costumer service and Royal Manufacturing for a great product