The King Gridded Stemline perc bongs by Kenta Kito Glass is for the dedicated smoker. Each piece is handmade with precision for the best smoke diffusion possible. The 38mm slender mouthpiece then goes into the 65mm body which houses the oversized gridded stemline per. The gridded Stemline perc will stack bubbles on bubbles! Included is a matching 4-hole screen slide, you are guaranteed to get a big hit! Just open the box and get started, as this piece comes complete and ready to use.