Huckleberry
Medium is ~27mm OD 8" in length
Large is ~34mm OD 8" in length
 
This tubing has a thick wall weight and should be worked slowly at first until a good heat is achieved all the way through. This small tubing blows out to a size that is good for cups ~60-90 mm and full size tubes ~45 mm. This tubing can also be used for cans on bubblers, main section or feet of rigs, or heady thick  spoons.