Great piece & price ! Solid, used in our water bong
These adapters are amazing and for 15$ you can't go wrong, most places where I'm from do not carry these, and if they do they are 30$+ it's great to turn your water pipe into a concentrates rig!
4/5 simply because the metal ones (even though more pricey) are better quality!
Purchased for euro water pipe an standard nail! Worked great!