Finish Line Shock Oil Suspension Fluid is Premium suspension fluid formulated specifically for all oil damped bicycle forks. 100% compatible with ALL suspension designs and seals. A semi-synthetic oil formulation that has become the top choice of professionals worldwide. Will not thicken or thin due to changes in temperature. Low foam technology delivers consistent and predictable damping in all riding conditions. Race proven to deliver superior performance in all suspension systems. A super high viscosity index of over 235 provides consistent damping through the longest and most extreme of riding conditions.