The INA Accessory Belt Idler Pulley (70mm) - 5310162100 is a high-quality pulley designed to be used in automotive engines. It is used to guide and tension the accessory belt, which drives various engine components such as the alternator, water pump, and air conditioning compressor. This pulley has a diameter of 70mm and is made from durable materials to withstand the high temperatures and stresses of engine operation. It is a genuine OEM product from INA, a trusted brand in the automotive industry. This idler pulley is compatible with a wide range of vehicle makes and models and is easy to install. It ensures smooth and reliable operation of the accessory belt, helping to maintain the performance and efficiency of the engine.