POWDER ADDITION FUNNELS Designed with one side flattened to allow funnel to be used in multi-neck flasks where space is limited. Flat side dimension is the distance between the center of the standard taper inner joint and the flattened side of the funnel Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements ID at Funnel Top (mm) : 150 Flat Side Dimension (mm) : 45 Standard Taper Joints : 24/40 Case Qty : 1