steewith2ees
Bluelight Crew
The exchange website sells them for the UK people. They sell packs of screens too. It's a very handy website that does harm reduction but I bet many don't know the exchange also delivers online. It's anonymous as in they don't give your details to anyone.
They also offer naloxone kits by the way!
If you are talking about ES they are untouchable as a HR service. Most community needle exchanges use their products, the enterprise being set up originally by a former stat. services drug & alcohol worker who I had an online correspondence with 8 years ago just after the drought while he was doing a podcast called 'Hooked' which told it how it is. If they are selling pipes then they will be as safe a contraption as is possible due to the potential harm by using inappropriate materials in home made efforts which can cause harm to peoples lungs, mouths and lips due to the temperatures they can reach.
Its been a couple of months since I broke my last glass pipe so I am using ash and a home made piece of crap again. 10 mins ago in fact. There is nothing like a wake up pipe at sunrise, left over from the previous day....