... cloth, top rubber, tensile body, bottom glueNarrow V-belt type two: one for the reference system (metric), the cut ... effective system (Imperial), type sub-9N, 15N, 25N three.Mark narrow V-belt mark composed of band type, the benchmark length or ... example: the baseline length 2500mm the effective length 1600mmSPB type with or 15N type withThe mark method: SPB2500GB × × × × or 15N1600GB × × × × Narrow ...