This 10 frame Vivaldi board is at a discount because of some superficial blemishes, and we don't want to charge full price for it. We would use these in a heartbeat ourselves, and often do. Very structurally sound, the bees certainly won't notice, it's just not quite as pretty as our normal ones. Pictures attached of any blemishes, which if needed are filled with a sawdust/woodglue mix. All joints glued and stapled, uses stainless steel screen, and it is made of radiata pine. Includes Vivaldi screen.