I got this piece at my LHS and it cost me $44, i think i got a pretty kick ass deal, it has a slitted diffuser down stem and is glass on glass with a 14.5 mm joint, and an ice pinch. its my first bong.
Yeah it's 5mm thick, and the dude at the shop said I wasn't going to find glass this thick for even close to the price, but I thought he was just trying to make a sale haha.
Got a $50 gong with 5 mm glass and a diffused downstem and icecatch for $45 with a free pipe case and glass cig one hitter, looks quite a bit like yours
Yeah I probably ran 5 grams through her, and she hits like a champ with the ice and six arm diffuser it is super smooth.