The 6mm x 6mm x 5mm square tube and the 5mm rod used for Science Olympiad is almost here. We are waiting to get a tracking number from our supplier. If all goes well and it clears US Customs with no issue, we expect to have this by 8 November or sooner. We apologize for running out of carbon fiber. We were not aware of the need for this size when people began ordering it. We’ll do our best to keep this in stock in the near future. We apologize for the inconvenience. Thank you for your patience and for your business.