Lufkin 20 oz. Inage Solid Brass Cylindrical Plumb Bob

Description

Lot of 5 plumb bobs with 5 tapes. (Ten items)
How to Measure an Inage Plumb Bob Tapes cut and fitted with the swivel snap to be used with the 588 and 590 plumb-bobs are known as inage gauging tapes. When the plumb bobs are assembled to the swivel snap the zero point is at the bottom of the plumb bob. When being used, the plumb bob and tape are lowered until the bob contacts the bottom of the tank. When the tape is reeled in, the liquid line is read on the tape line itself, thereby showing you the contents of the tank.