Olympic Horizon-Helix *read description*

18mm Male that has a small crack in the joint. Can send it to a repair artist after purchase if needed. Crack hasn’t expanded since I noticed it. horizon-helix from Olympic glass. The helix perc is similar to a gridded puck. The tube has some water marks/bloom that I tried to capture as best I could. Not sure of the neck dimensions, but the can is 60mm. The function is really great, I prefer it to my old Rawlins horizon. The inside of the lip is faceted. Olympic closed and became Rawlins, which still makes tubes.