I don't really know the weight. Mine is a 4"x4" at about 4' with a tsuka carved into one end. Isn't that about what yours is too Dave? It isn't as long or heavy as I'd like but it'll do for now. I supplement the furibo swings with sledgehammer levering as well. Keeps my grip strong for things like Daito-ryu. It also makes the regular Jikishinkage-ryu bokuto feel very light. Kendo bokuto, shinai and good shinken feel like they aren't even there. I do think it is very important to be able to use your sword for a very long time without tiring and the furibo does help with that!