i did some prospection today. i only found copper tubing of 6-8-10-12-15-18-22_60!- mm and one bigger
and not only today, i've never seen other measurements
so i have to make a decision between 22mm and 60mm, the one is too narrow and the other is to wide.
who can help me to make this decision??
neither i can find a cap (certainly not a wide one) where do you guys find those, i've only seen them on some sites (homedistiller,..)