ROCTEC 500, 90,000PSI, Long Life Nozzle, .375 x .043 x 3.000"

It is important to choose a focusing tube that is compatible with the specific machine being used. Factors such as the size and shape of the aperture, the length of the tube, and the material it is made from can all affect the performance of the waterjet. It is also important to inspect and maintain the focusing tube regularly, as damage or wear can affect the quality of the cut and reduce the lifespan of the tube. This may involve cleaning the tube, checking for cracks or chips, and replacing the tube as necessary.