This is a fishing line. What number is it?

The length is 4.5 meters, and the line passes through No.4.0.

The normal length of the hand pole string is 3.6m, with one dimension every 90cm. 3.6-4.5-5.4-6.3-7.2-8. 1, which is a relatively conventional handle length.

The line set of No.4.0 you selected is generally used to catch giant fish or fish flying about 3 kg in a black hole, which is a bit too thick.

Under normal circumstances, the main line of 1.5-2.0 is enough to catch crucian carp within 2 kg with a 4.5-meter pole.

Black pit is about 2 kg, fish is 3+2, normal situation is 2+ 1.2, squid 1.2+0.8. The front number is the line number of the main line, and the back number is the line number of the sub-line.

hope this helps