Coupling for glass stir bar only. Since it is flexible, you can use it without worrying about the center with the container or stirring seal (TBO type).
Just turn the coupler by hand to securely chuck the glass rod.
Specifications
External dimensions (mm): Total length 220 (shaft external diameter 8 x 125 H)
Accessories (mm): 1 each of 3 types of compressed rubber (inner diameter phi 6/8/10 x outer diameter phi 18)
*It can not be used for the ZZ series with inverting function.