This is some heady thick glass! It's 9mm thick and 20inches tall, in other words, this thing is killer. It has a good pull and uncloggable downstem. This is the same quality glass as a $300 piece, we're and you're truly getting a steal of a deal by buying directly from the glass blower, Mike, in San Diego. Thanks Mike! If you need a bong that can take a hit, look no further as this is the bong for you.