Precision ground glass stirring shafts,10mm OD, crescent type. Useful for stirring viscous materials at low rpm. Available for round bottom flasks of 1, 3 and 5 liters. Code -19, 3 liter size will fit a 2 liter flask, but closely. Flask opening must be 29/42 or larger. Use with Trubore bearings 8036,8038,8039,8040,8043,8047,8051,8053 and 8055. Compatible with our 8050 mechanical seal and 13443 collet type bearings. Join to stirrer motor using 8124 series chucks.