This Blue Print Aux Belt Idler Pulley, part number ADM596511, is a high-quality metal deflection/guide pulley designed for v-ribbed belts. It has an outer diameter of 72 mm, a width of 28 mm, and weighs 0.26 kg. This part is compatible with various Mazda models including Mazda2 II (DE), Mazda3 I (BK), Mazda3 II (BL), Mazda3 III (BM), and Mazda3 IV (BN). Original OE numbers for comparison include Mazda ZJ01-15-940. It is a direct replacement for other compatible parts such as SKF VKM 64026 and GATES T36418. Please use the vehicle identification tool to ensure fitment with your specific vehicle.