Help on conduit sizing for 1280ZJ DM18 back box (UK sizing)

[kuchars22]

hi i have bought this back box and have noticed that the compression gland is neither a standard uk 20 or 25mm diameter, looks to be in between the smaller 15mm and 20mm (perhaps 18mm and why its called DM18?).

can anyone confirm sizing and if anyone knows where in the uk i can get an adapter to take it up to any of the other uk diameters?

thanks

 

[Kawboy12R]

I can't help with the DM18 number but I work between metric and inches a fair bit. "Here", if it were conduit and a hair under 20mm it'd be 3/4" (19mm equivalent).

 

[kuchars22]

OK thanks

 

[kuchars22]

https://www.use-ip.co.uk/hikvision-ds-1280zj-dm18-junction-box.html

Above is what the gland looks like. I can't find anywhere in the UK with compatible conduit accessories. I am trying to find a reducer to 20 millimetres or or enlarger to 25 millimetres which is what we use in the UK, but either they don't do it or you have to order 50+ from a distributor!

Anyone know where I can get such an adapter? Might get some nail polish remover and try and reduce the diameter at the tip!