This PYREX® arsine generator is designed for arsenic determination by the silver diethyldithiocarbamate photometric method. It meets A.P.H.A. Standard 104A, ACS/USP and EPA specifications. The 125mL flask has a 24/40 inner Standard Taper joint and ball and socket joint between the absorber and scrubber is a 12/2 Spherical Joint. Complete unit includes a polyacetyl clamp. For a replacement flask, see No. 5000-125; for a replacement scrubber, see No. 3900-SO; for a replacement absorber, see No. 3900-AO; for a replacement polyacetyl clamp, see No. 7721-13.