ive bought some supposedly high quality stuff from a place where i had bought it previously about 2 or 3 years ago, but its smaller in diameter on the outside and internally i think its 4 or 5mm inside. it has no markings, and its softer too, ive spoken to the shop in question and they have said they havent changed their supplier so it must be the same stuff, but im not happy, the pressure difference on each pole is so bad and it keeps curling in on itself.
just wondered if anyone else had a problem