This is a Bottle of 3,000 Weight Diff-Lock Silicone Oil by OFNA Racing. FEATURES: This silicone oil is used in gear differentials--mainly used in off- road nitro buggies. It"s used to slow and stop the differential action of the diff units, thus providing better output power to the drive train. INCLUDES: One Bottle of Silicone Oil 3,000 SPECS: Weight: 3,000 Volume: N/A rjm 7/30/02 ir/kh