drilled with a half of an inch hole in the exact center so it can be inserted into 2 4 and 6 a half of an inch hole 11 is also drilled through 10 that will allow common table salt to be packed into the entire area between 5 then a half of an inch threaded perfectly suitable plastic plug 12 is screwed into 11 that has also been threaded for screwed assembly next a perfectly suitable plastic coupling 13 that is half of an inch in diameter and threaded on both ends is screwed into 6 a perfectly suitable round cylinder 14 that is eight inches in diameter and cut to an exact length of two and three quarters of an inch is inserted into the upper groove of 10 this part 14 creates an upper compartment for gauges specifically a digital timer inhalation meter and a flash counter 17 next a perfectly suitable half of an inch plastic pipe 15 that has been cut to exactly three and one half inches in length and threaded at both ends part 15 is screwed into 13 another perfectly suitable round plastic plate 16 that is three quarters of an inch thick and exactly eight inches in diameter that has been grooved on the bottom side part 16 also has a half of an inch drilled hole in the exact center is insert into 14 next a perfectly suitable half of an inch plastic elbow 18 that is threaded at both ends is screwed into 15 then a perfectly suitable half of an inch plastic pipe 19 that is exactly two and one half of an inch in length that has been threaded on both ends is screwed into 18.