XTR Racing Ronnefalk Pure Silicone Shock Oil 42.5WT Edition V2 200ml (6.75 oz). Part number XTR425.
XTR silicone oils are produced under strict control in XTR's laboratory and were tested and developed by XTR's World Champion drivers. They were tested in extreme temperatures for durability and stability, and XTR guarantees the best performance from the start to the end of the race.