The Cummins ISX 11.9 2011 To 2019 Engine Fuel Injector O-Ring Kit is an ideal replacement for your specified engine. This kit includes 6 black rubber O-rings and 6 copper cups, with a 1.36 inch inside diameter, 1.57 inch outside diameter, and 0.103 inch thickness. Made from quality materials, it is designed to resist damage from fuel, oil, and extreme temperatures. This cost-effective solution offers original equipment quality at a competitive price. Quality tested and fitting most makes and models from 2011 to 2019 with Cummins ISX 11.0 engines, it is a durable and reliable choice. Direct OE replacement numbers: Cummins 2872767 and 3347939.