This is a 250-4 tube with a TR87 stem. This 4 inch tire tube has a TR87 Bent Metal stem and the valve stem location is center. Recommended application is for Bias Ply tires and the recommended tire fitment is for a 250-4 Pedal car tire. Actual item may differ from photo. Coker Tire Company features a great selection of specialty small inner tubes. Hartford brand tubes are built to meet our specifications using premium grade materials. They are designed specifically for their applications, to provide a high quality inner tube solution and reliable service life. These are excellent quality tubes, available in a wide range of sizes for collector and specialty vehicle applications.