Heavy duty, 28mm O.D. glass stirring shaft for use with ACE 12845 reactors. Shafts are pre-drilled to accommodate 8091,8093 & 8101 agitators for 28mm od shafts. Recommended for use with either our 8067 Trubore™ bearing with debris trap or our 8050 non-shedding bearing. For motor connection, use our 6472-155 swivel connector and 6472-157 chuck.