Used in testing for soluble and insoluble cyanides in water. Basically conforms to ASTM D 2036 (excluding modifications). Flask is 1L with 24/40 joint and #7 Ace-Thred permitting variable depth positioning of fill tube which has a float valve for added protection against boil back. Jacketed still head is lengthened for efficient condensing. Head and cold finger have a 29/42 joint and #11 Ace-thred on side arm. Two #11 bushings hold the threaded adapter to still head. 10-20m frit, 19/22 trap joint, and 8mm side arm threaded adapter.