Introduction:

25.4mm Screw C-mount Mount

It moves the lens farther from the film or digital sensor. The farther away the lens is, the closer the focus, the greater the magnification.
This extension tube does not affect image quality as there is no optics inside. In comparison, a close up filters are often blamed for degrading image quality.
The more tubes you add, the closer the focus and the greater the magnification.

Specification:
Ring height(without screw part): 5mm
Screw mount: 25.4mm

Package includes:

Macro Extension Tube x1