they're heavy metals... it's the soft metals that are bad for you (lead, aluminum ect... gold is a soft metal, but i'm not sure if it is harmful in smoking or not....
slipknotpsycho Reviewed by slipknotpsycho on . Pipe Screens? With all this talk about aluminum foil bad for you, arnt the pipe screens aluminum also? i used to you aluminum foil until i noticed i could melt it with a bic lighter.. and saw fumes... so none of that, i hope these screens are steel, Rating: 5