Original UR0742 Ultimate RC silicone oil in viscosity 425 cps, designed to fill the shock absorbers and with a capacity of 75 ml. Ultimate Racing shock absorber oil is made from 100% pure silicone oil and will not dilute or thicken in cold weather in hot weather. The higher the viscosity number of the oil, the thicker the oil. Ultimate Racing Silicone Oil contains friction-reducing additives to ensure the life of the shock absorber and minimise viscosity changes. The emerging Ultimate Racing brand covers a wide range of silicone oils, ball bearings, screws, quick tank guns, starting boxes and other accessory products and can look back on years of experience. UA racing products have the advantage of being developed by engineers working with experienced racers. Ultimate Racings philosophy includes in particular the constant pursuit of improvement of its own products, as well as 100% quality control carried out in the company in Spain.