basket-rack assembly consists of six open-ended transparent tubes each 77.5 ± 2.5 mm long and having an inside diameter of 32.0 to 34.6 mm and a wall 2.0 to 3.0 mm thick the tubes are held in a vertical position by two plates each 97 ± 2 three holes 36.0 to 40.6 mm in diameter equidistant from the center of the plate and equally spaced from one another Attached to the under surface of the lower plate is 10- mesh No. 23 (0.025-inch) W. and M. gauge woven stainless steel wire cloth having a plain square weave. The parts of the apparatus are assembled and rigidly held by means of three bolts passing through the two plastic plates. A suitable means is provided to suspend the basket-rack assembly from the raising and lowering device using a point on its axis
The design of the basket-rack assembly may be varied somewhat provided that the specifications for the glass tubes and screen mesh size are maintained