Gold Drop : Low viscosity oil that can be used for almighty. HYPER BB / bearing oil that can maintain and protect the original performance of bearings.Compatible with all genres such as fishing and radio control. Silver Drop : Suitable for high load bearing oil. Stretchable and hypoallergenic oilier and performance to maintain and protect timeline, Hyper Bearings for BB/bearing oil. Fishing/RC other: Compatible to all genre.