Miles Ultihyd Bio ISO 46 - Biodegradable Hydraulic Oil is formulated with synthetic esters to provide enhanced biodegradability and performance. It provides excellent thermal and oxidative resistance, leading to a long fluid life and cleaner operations even in extreme operating conditions. Miles Ultihyd Bio also utilizes the latest anti-wear and anti-corrosion additives to provide exceptional levels of service and protection.Typical properties: ISO Grade 46; Viscosity cSt @ 40°C 47, Flash Point °F (°C)441 (227), Oxidative Stability 10,000+,, Pour Point °F (°C)-47 (-44),Copper Corrosion, 24 Hr 1a, Color