Double V Beltdescription： With multiple working shrfaces.Double V-belts offer great flexibility and are applicable to mulitple shaft transmission system such as asinning and agricultural machines as well as calling "Hexagon belts"Length(mm):HAA(1500-3000)HBB(1500-8000)HCC(2000-8000)Double V-beltsAA(51 to 128 inches);BB(43 to 300 inches) and CC(81 to 420 inches)Lengths that are not in inventory can be made to order.Double V Belt Size : HAA HBB HCCProduction TypeTop WidthHeightAngleLength ConversionLength Range(Inch)Length Range(mm)FactoryMarkHAA131040°Li=La-6338-197965-5000LiHBB171340°Li=La-8239-1971000-5000LiHCC221740°Li=La-10783-3152100-8000Li http://www.conveyorbeltchn.com/v-belt/double-v-belt.html