The Sludge Judge II is made from a 1-1/4" (3.18 cm) outside diameter plastic tubing resulting in double the capacity and a very rigid unit when assembled. Designed for sampling 5% or less solids. It holds 6 oz. per foot (178 ml per .31 m) and can be assembled according to the requirements of the job. Add or subtract sections as needed, and the 1-ft. (.31 m) markers on the tubing will help identify the amount of sludge in the tank. The unit is made up of three 5-ft. (1.53 m) sections (top, extension, bottom) or individual sections can be combined as required.