At the same time we purchased 4 companies together with Kij company D company Kit, the skin was the hardest, it is hard to break easily when bending, but it might be strong but it was hard to put in pipes from other companies. Whether you buy it in the future or not is because you saw durability.
The outer layer is strong and it seems to be durable. So somewhat solidified. There is a sense of security even if you use it in places where you tend to come into contact or lower. Unlike the picture, the color looks like a degraded black hose and it is disappointing.