I didn't say build, cause I didn't really build anything. I bought all the 2" SS tubes on Amazon 24 and 12" for the column, a sight glass, 6" T, 90* elbow and 6" on top of the tee. This is a Column Controlled Vaper Management (CCVM) still. The reflux condenser is made out of 70" 3/8ths OD...