Microscope Objective RMS Thread Extension Spacer Parfocal Length 3mm 5mm 7mm 10mm 12mm 15mm 18mm Optional.

Product Feature:

Female theread RMS(0.8 inch 1/36TPI)

Male theread RMS(0.8 inch 1/36TPI)

Increase an Objective's Parfocal Length by 3mm 5mm,7mm,10mm,12mm,15mm,18mm per Extender for your choose.

Adapter (made of aluminum, anodized black) to use RMS thread (.8"X 36tpi) objectives,

The inside of the adapter is fully threaded to minimize reflections

Includes 1pcs adapter,the lens just for demo.
Note:
The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.