This reducer is perfect for adding a 10mm entry lampholder onto a standard 20mm electrical conduit pipe.
Simply screw this reducer onto the end of a 20mm male thread then using a small threaded rod screw on a lampholder.
The reducing bush 20mm to 10mm has a female 20mm thread and a female 10mm thread.
Please Note: You will need to use a small piece of threaded rod to fix a lampholder onto this search for: 62990 for the best threaded rod to use.
Female Thread: 20mm
Female Thread: 10mm