The Performer Series Carburetor Calibration Kit includes an assortment of metering rods and jets, one pair of metering rod retaining springs and a complete instruction booklet. This will allow you to achieve the correct air fuel ratio on your carburetor to ensure smooth idle and excellent engine performance. All necessary parts are included with the kit. You can find them at your local auto parts store or online at Amazon or eBay. edelbrock calibration kit can easily be found at here. Once you find the website, simply search for "edelbrock calibration kit" to find exactly what you are looking for. You can also find other fuel system components on this same site as well. Just make sure to double check the model number of the carb you are working with before making a purchase. This is essential so you are not purchasing the wrong parts. You can buy from link below – https://www.totalperformance.net.au/Edelbrock-1480-Carby-Calibration-Tune-up-kits-suits-1407-1410-1412-1413-Performer-series-carbs