This sale is for a near mint condition Mamiya RZ67 Extension Tube 82mm (No.2). No caps included with this one, sorry.There are absolutely minimal signs of use other than some of the lettering being rubbed off the tube barrel.
This tube has been tested and the contacts work perfectly and everything works fine. This extension tube will give you 0.65 to 1.01x magnification with a standard 127mm lens. With a No. 1 tube added, you can get to 1.36x magnification with a 127mm lens.
A copy of the instruction leaflet can be downloaded from the Downloads section of this website that gives full details of usage (essential for correct exposure if you do not have a metered finder).