Zacuto Z-RS-M12 12" Female-Female rods (Pair) has been discontinued, here are some related products you might like:
Zacuto Z-RS-M12 12 inch pair of rods with female threaded on both ends. 1 set comes included with all Zacuto Universal Baseplates.
Zacuto's rods are all lightweight; 15mm diameter with 60mm spacing and clear anodizing. They are made out of 6061 aluminum and the threads are ½” 13.
More information about Zacuto Products (Link to Zacuto Website)