Recommended For: Petroleum-base hydraulic oils, glycol anti-freeze compounds, water, hot lubricating oils and air. Lock-On hose and couplings are NOT recommended for vibration or pressure surge applications such as permanent piping in residential or commercial buildings. Tube: Black, oil-resistant synthetic rubber (Nitrile - Type C). Reinforcement: One fibre braid. Cover: Oil and mildew resistant textile braid, impregnated with synthetic rubber. Temperature Range: -40°F to +212°F (-40°C to +100°C). For air: -40°F to +160°F (-40°C to +71°C). Couplings: Field-Fit Lock-On series.