This is a Bottle of 1,000 Weight Diff Oil for the HPI Baja 5B, HPIC0600. FEATURES: Clear in color High viscosity silicone oil for gear diffs It's used to slow and stop the differential action of the diff units, thus providing better output power to the drivetrain INCLUDES: One Bottle of Silicone Oil 1,000 SPECS: Weight: 1,000 Volume: 2oz (60cc)