LMAO, You guy's crack me up.  My day was absolute crap!  then I come onto the forum to find a pile of smart a$$ responses.  I really needed a laugh and you guys certainly provided me with that!

I may have been a bit off when I said it was the "perfect" buoy for a crab trap.  I certainly cannot write my name and number in 6" high numbers or letters...  Then again, I don't have 6" letters and numbers on my other crab trap buoy either!  It's small but it'll float a rope without a problem and I can certainly use this as a safety float for other items I don't wish to see sinking to the bottom of the ocean.  For $6 it'll work just fine for whatever it finally gets used for.

The site I pulled the 8 pound buoyancy rating from is here:

http://www.snlcorp.com/SNL/CommercialTackle/Floats.aspx

The one I picked up is obviously an older model (maybe it was rated for even more?!? haha).

The link above clearly states 8 pounds and I now figure it's possibly 5 pounds at best.  So how do they come up with 8 pounds 

As for weighting this thing down in a tub of water.  At some point, I certainly intend to try that (more for giggles 'n' shits than anything else).

This size of buoy cannot be inflated as it's a sealed unit.