BELL JAR KNOBBED – GUPTA BRAND 3001006 Posted on March 4, 2017May 1, 2017 by admin Made of soda glass with ground flange knobbed. Code Ht. X Dia (Cms.) 3001006A 8×4 3001006B 9×6 3001006C 16×10 3001006D 18×10