Ultra thick oil for the gear differentials such as used on the 1/10 eletric and nitro touring cars. HUDY Ultimate Silicone Oil is manufactured in Europe by a specialized silicone oil premium manufacturer, these new oils were exclusively created for HUDY. Each batch of ultimate oil is laboratory tested and calibrated to ensure the highest possible consistency and quality from batch to batch. Based on the industry-proven CST rating, the new line of oils will be easy to identify, adjust, and feel. HUDY oils cover the complete range from Ultra Thin (100cSt)... Thin (1000 cSt)... Medium (5000cSt)... Thick (10.000cST)... up to Extra Thick (2.000.000cSt), with numerous stages in between. With thinner oils suitable for shocks (up to Medium), and thicker oils suitable for differentials, you will be able to find the correct viscosity you need for your application. Each category of oils is individually colour-coded to allow you to instantly recognize the type of viscosity.