Extremely easy to work with. Connecting hose to fitting is a snap since not even a wrench is needed. Simply slip hose onto fittings. It?s that simple. Textile braid reinforcement now available in blue or black. Patented elastomer smooth bore inner tube. - 45?F to +300?F temperature rating. Vacuum rated up to 28 in. Hg. Operating pressure on all sizes at 250 psi. Never needs a clamp. Applications include fuel, lube, coolant and air lines.