Channel 18, number 18. What does it mean?
Channel 16#a specifications 160x, 63x, 6.5mm, theoretical weight of 17.24 kg per metre, channel 16#b specifications, 160x 65 8.5mm
The theoretical weight of 19.752 kg per metre, channel 18#a specifications 180X, 68x 7 mm, theoretical weight of 20.174 kg per meter, channel 18#b specifications 180 X70 x9mm, theoretical weight of 23 kg per meter, specifications are x height, X leg width, waist thickness.
