Dimensions: 
 Inner diameter of the duct 32 mm / per meter 
 Inner diameter of the duct 40 mm / per meter 
 Inner diameter of the duct 45 mm / per meter 
 Inner diameter of the duct 50 mm / per meter 
 Inner diameter of the duct 55 mm / per meter 
 Inner diameter of the duct 60 mm / per meter 
 Inner diameter of the duct 65 mm / per meter 
 Inner diameter of the duct 70 mm / per meter 
 Inner diameter of the duct 75 mm / per meter 
 Inner diameter of the duct 80 mm / per meter 
 Inner diameter of the duct 90 mm / per meter 
 Inner diameter of the duct 100 mm / per meter 
 Inner diameter of the duct 110 mm / per meter 
 Inner diameter of the duct 120 mm / per meter 
 Inner diameter of the duct 125 mm / per meter 
 Inner diameter of the duct 130 mm / per meter 
 Inner diameter of the duct 140 mm / per meter 
 Inner diameter of the duct 145 mm / per meter 
 Inner diameter of the duct 150 mm / per meter 
 Inner diameter of the duct 160 mm / per meter 
 Inner diameter of the duct 170 mm / per meter 
 Inner diameter of the duct 180 mm / per meter 
 Inner diameter of the duct 190 mm / per meter