T W I N - WA L L B O O M P I P E - 8 5 B A R TW-325 S I N G L E - WA L L B O O M P I P E - 8 5 B A R ULTRA III 1.6 X MORE THAN THEIR TWIN WALL 3.5 X MORE THAN NON HT 2 X MORE THAN THEIR TWIN WALL MORE YARDAGE. BETTER VALUE. *results vary based on job location and material*