Great product and service
We have installed the Bertha clear panels on most of our home and are very happy with the results. The screw in stud with wingnut/washer is an easy to install system that seems very strong. The panels are lightweight but seem very tough and it is great to be able to see through them and get sunlight in the house. We plan to order more and finish our home as soon as we can. Customer service is excellent and the order was packed well. We highly recommend this vendor.