There only light, I`ve got one (D/C)and its only 630grms and that`s with a full Magnesium body. I also have a few old heavy vintage film cameras which weigh a fair bit.
However, as I said, for me, if the tripod can take a heavy weight like the one I bought, then it should be more robust and may not break as easy as some do. The Tripod itself is really light and inexpensive.
Check`em out.
Cheers