Heavy duty, 28 mm O.D. glass stirring shaft for use with ACE 6472, 6473 and 6474 reactors. Shaft has pre-drilled holes at top and bottom for positive attachment to motor coupling and agitator, respectively. Recommended for use with 8067 PTFE Trubore® and 8050 mechanical seal bearings. Use with 8091, 8093, 8101 agitators for 28 mm rods. Fits Ace 6472-155 swivel connector and 6472-157 chuck.