Price: $35.00 Payment method: PayPal Item condition: 9 Shows signs of use, but very clean Shipping instructions: USPS CONUS
They are cheap extension tubes but worked with a 70-200 so sturdy enough. They work with the EF-RF adapter. They are all plastic but have mount connections so things work as expected. I have not used them forever and not planning to, so letting them go.
Generic Canon EF extension tubes