I ran cross some heavy white fiberglass telescoping tops and inner covers the other day. One of the tops had a 1982 date on the inside of it. I can't find anything like these on any bee supplier sites.
They're well made and heavier than the wood ones we use now. The inner covers are the same way - good stuff. They'll never wear out and they have built-in venting.
Has anyone ever used these before...? I don't they're made any longer. Thanks..