Construction: Inner Tube:Polyester elastomer(cream color). Reinforcement:One polyester braid. Cover:Proprietary urethane blend("Tuff-Skin"). Cover color:Black,non-perforated(other colors available). Temperature range: -40F-135F(-40C-57C)Limited to 150F(+66C)for water-based or fire resistant fluids.(Delta) working length at rated WPSI:±2% max. Features: Bonded construction,slim profile and light weight,flexible and kink resistant,black color denotes 4000 psi,low coefficient of friction,excellent cut,gouge and abrasion resistance 4000psi working pressure. Applications: High pressure water cleaning ,lateral sewer lines,water jetting equipment,not for hydraulic applications.