Description Twin Black Plastic Hose with White Stripe 3/8 ID. 5/8 OD. Transflow® Twin Vacuum Tubing is lightweight, resistant to flaking, cracking and aging from oxidation and stays flexible over time and in all climate conditions. Features two tandem tubes with a smooth non-porous inner wall for easy cleaning and dependable air flow. Phthalate free. OEM Surge pulsators, Mini Orbit and Eclipse milking units Sold by the foot. Order qty 100 for a full roll. replaces skus 7750-0220-536FT & 7750-0221-536FT 9/26