Euro thread sleeve/cap? Or size and pitch?

I might be able to get my hands on a cheaper carbon fiber telescoping pole but I’ll have to put the rest together, meaning the brush, threads, hose, etc. Anyways, where can I purchase the euro thread sleeve/cap? And if not, any one know the specifications of the size and thread pitch?

Try WCR sales, Water Fed Poles, Parts/Fittings

I had to add a euro thread to my simpole I picked one up from here Aluminium Pole End Screw Type1 - Aqua-dapter. I turned the shaft down to be a tight fit and used gorilla glue … works great