I am sorry. I actually meant to say: I wish there were 4.9 mm cell one-piece, all plastic frames. All my hives have plastic frames and I think they are great. Cost effective and provide some 15% more cell area than wood frames. Waldemar LI, NY <<I And I wish the 4.9 mm foundation was available in food grade plastic...>> I believe it is. Try Dadant. I certainly had some samples for testing, which have been very satisfactory. The odd thing was, the bees I was downsizing at the time drew it out better than they did 4.9 wax. From what I remember, the plastic was food grade. Regards, Robert Brenchley :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::