Maxtop Ultra low temperature hydraulic oil (L-HS) high quality compound additive is refined with hydrofining base oil. Ultra-low temperature hydraulic fluid is a high-performance synthetic hydraulic fluid designed for extreme cold environments, suitable for polar research, aerospace, cryogenic industry and other harsh scenarios. Ultra-low temperature fluidity ensures fast start-up of equipment in extremely cold environments. Extreme pressure anti-wear protection to protect the wear of hydraulic pumps and valves under high load and low temperature conditions. Low volatility, reduce volatilization loss at high temperature, ensure safe operation.