This sale is for an excellent condition Mamiya RZ67 Extension Tube 45mm (No.1). Please note that the end caps are NOT included.
Ths tube has only normal very minor signs of use, just a little lost paint on the edges. It has been tested and the contacts work perfectly and the ring works fine.
This extension tube will give you 0.35 to 0.72x 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).