Designed for arsenic analysis by the diethyldithiocarbramate colorimetric method. Meets APHA Standard 104A, ACS/USP, and EPA Specifications. Fabricated from borosilicate glass for grease free operation. Joint on 125 mL flask is 24/40, polished. Spherical joint between absorber and scrubber is 12/2. Complete item consists of absorber, scrubber, and Erlenmeyer Flask.