20 Ligne = 1/2" dia. = 12.700 MM
25 Ligne = 5/8" dia. = 15.875 MM
30 Ligne = 3/4" dia. = 19.050 MM
35 Ligne = 7/8" dia. = 22.225 MM
40 Ligne = 1" dia. = 25.400 MM
45 Ligne = 1-1/8" dia. = 28.58 MM
