B&S produced 4 sizes of Hg filled plumb bobs, like the L. S. Starrett Co. The B&S versions are much less often encountered here (even though the territory in which I roam is quite close to where these bobs were made, in Providence, RI. This one has and length of 4 inches with a body width of just ½ inch. It weighs 3 ½ oz and has both all of its shiny nickel finish and its original braided silk black line. It is fine.