Inner Tubes All Metzeler tubes are made from natural rubber blend and feature heavy-duty construction for excellent service and puncture resistance FOR RIM SIZE 19? INNER TUBE VALVE STEM TYPE EU 34G| TR-4| V1-09-1 INNER TUBE VALVE STEM TYPE US TR-4 (round base) Center Metal Valve (threaded and nuts) MATERIAL Rubber PRODUCT NAME Inner Tube TUBE FITS TIRE SIZE 100/90-19| 3.00-19| 3.60-19| 90/90-19 TYPE Motorcycle UNITS Each