I purchased several pieces. Although the attached universal coupler was very easy to use, the free part blew away with a little shock, and there were two scenes in danger. Although it was exchanged, the caulking part is extremely weak and I think that it is a manufacturing defect. As high pressure is applied, if the hose runs out, it will cause a lot of damage to the vehicle you keep. I would like to also report the inspection results on the defective part. The hose itself is useful.