Tube standard all sizes

Inner tubes by Vee Rubber. These tubes are made in Thailand from 100% natural rubber. These are great quality flexible tubes. Most have the steel straight valve stem with the nuts and valve caps (TR4). The 500/510-16 and some 10 inch tubes  have the 45 degree off set steel valve(TR87). By our standards the Vee Rubber blue box is a standard tube at 1.5mm thick even though they call it heavy duty . The yellow box which they call ultra heavy is by our standards just heavy duty. The 170/80-15 tube has a PV78 valve which is a steel threaded valve with a 90 degree bend.