What does 8h mean?

According to the query 027 art test network, the meaning of 8h is as follows:

1, 8h, 8h means 8h, and h is the abbreviation of hour.

2, 8h, if it is on a fishing rod, h is the abbreviation of hardness, indicating hardness, and the number 8 indicates hardness grade. The higher the number, the higher the hardness, similar to pencil hardness.

3.8H is a fashion home brand under Chengdu Fun Sleep Technology Co., Ltd., and "8H(8 Hours Good Sleep)" is the advertising language and brand pursuit of 8H.