Tofu filter cloth said 20 items, 40 eyes, 60 eyes, 80 items, what do you mean?
The data were checked just now. The standard on the data is the length of 1 inches and the number of holes inside the network.
You said 20 different mesh density, and is 1 inches (2.54cm) latitude or longitude has 20 holes, the higher number is more dense, the higher the filtration accuracy.
The eye is the hole. The 20 eye is a square inch with 20 holes in it. 40, 60 and 80 mean the same.That's the standard in my memory.
