This sale is for a mint condition Mamiya RB67 Extension Tube 82mm (No.2). Suitable for use on all RB67 cameras – Pro, ProS and ProSD. Both lens caps and the original polystyrene inserts and box are included with this tube.
There are absolutely minimal signs of use. I doubt whether this has been used more than once or twice, if at all apart from me testing it. It has been tested and works perfectly.
This extension tube will give you 0.65 to 1.01x magnification with a standard 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).