H07rnf 3x1 5 and H07rnf 3x2 5 is a size of H07RN-F cable in 3 cores of each core 1.5mm2 and 2.5mm2.
1. H07rnf 3x1 5 and H07rnf 3x2 5 meaning?
Rubber flexible cable in 3 cores from the size from 1 sq.mm to 300 sq.mm for general purpose.  3 core rubber cable is in copper conductor, EPR compound insulation, PCP compound sheath, Heavy duty rubber flexible cables.
Rated voltage: 450/750V
Cores identification 3 cores: Green/Yellow, Blue, Brown
H07rnf 3x1 5 means there is one of three cores for grounding in green/yellow color. H07rnf 3x1 5 is a size of H07RN-F cable in 3 cores of each core 1.5mm2 areas
H07rnf 3x2 5 means there is one of four cores for grounding in green/yellow color. H07rnf 3x2 5 is a size of H07RN-F cable in 3 cores of each core 2.5mm2 areas
2. H07rnf 3x1 5 and H07rnf 3x2 5 fexible rubber cable specification

H07RN-F cable Static Use Bend Radius: 3 x outer diameter (for Ø < 12 mm) or 4 x (for Ø > 12 mm).
3. H07rnf 3x1 5 and H07rnf 3x2 5 cable prices

The cable price is for reference, it's based on copper (LME) price changing.