This is a hard to find Nikon PK-13 Extension Tube designed for use with Nikon manual focus lenses in exceptional condition! The extension tube hardly shows wear and it had been checked & tested to work properly with no problems. This is a useful extension tube to increase the Macro magnification ratio of  Nikon Macro lens great for copying and close-up photography! I have a money back return policy if not satisfied so buy with confidence. Shipping will cost $6 within the US or $18 for other international destinations.