The bottom of the interface is made of aluminum material which is sturdy and.Thickened rubber is used that is odorless and non-corrosive.The workmanship is precise and not prone to air leakage.This protects your motorcycle journey and helps you drive safely. Material Type is Rubber and Aluminum.is.OEM CODE is not applicable.The package includes items as shown in the picture.These accessories can be directly replaced. The Cylinder Gasket Kits are made with a rubber and aluminum construction which helps protect your motorcycle's engine.The -engineered design provides a leak-free seal The kits include all necessary components for installation.They are designed to fit a range of models including Forty Eight XL1200X Iron 1200 XL1200NS Iron 883 XL883N Roadster XL1200CX Seventy Two XL1200V Sportster 1200 Custom XL1200C Sportster 1200 Low XL1200L Sportster 1200 Nightster XL1200N Sportster 1200 Roadster XL1200R Sportster 1200 Super Low XL1200T Sportster 1200 XR1200 Sportster 1200 XR1200X Sportster 883 Custom XL883C Sportster 883 Low XL883L Sportster 883 Roadster XL883R Sportster 883 Super Low XL883L and Sportster 883 XL883. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.