Not a satisfactory transaction !... I ordered two distinct size V belts..and received two exactly the same length..both the wrong size ! ...I have a bespoke alternator drive on my narrowboat engine..having replaced the crank pulley with a different diameter..the original 1185 C belt was too long..so i ordered..two steps down..1175..and 1160....outside measured as the original..and all past belts were !..You sent me 2x A45 1143 Li...measured inside...almost the same length as my original...no explaination of your method of measurement against my original....i must now recalculate my inside belt length requirement and reorder....i hope i may return the incorrect belts as credit for new purchase ?