Even a diagram on which way to wrap it - I tried explaining to an apprentice a long time ago which direction to wrap as he was having issues . . . maybe I spoke Yorkshire or summat as he just looked befuddled . . . I can't remember anyone ever explaining it - it just seemed obvious after the first attempt at the wrong way.This is the stuff I got given in BOC
The standard quoted says it’s unsintered. No idea if that’s good or bad for oxygen as I’ve never used it!
View attachment 375642