Types 8 and 10 generally refer to working pressure. If you ask how to see the pressure, it cannot be seen with the naked eye. If you ask how to distinguish the specifications of the hose, then generally the hose is marked on it. There are specifications and models, take the Yuze 3-inch PVC hose for example. It has the trademark and material PVC on it, and then the specification is 10-80-20, which means it is type 10, 80 caliber, 20 meters long, then the corresponding type 8 is 8 -80-20, I hope this answer is helpful to you, if you are satisfied, please accept it, thank you.