Omix proudly offers all the parts you need to keep your Jeep running like new with quality standards that always meet or exceed those of the factory part. This replacement accessory drive belt idler pulley fits 07-11 Wrangler JK models equipped with 3.8-liter engines and 07-10 Grand Cherokee equipped with 5.7 and 6.1-liter engines. Pulley measures 70 mm OD and 24.5 mm width. Replaces OE 4891720AA