We are unable to say with 100% certainty these are the 31GBF-70-E, but they are the closest thing in the catalog that we could find that matches pitch and length is this p/n.
This one measured a tick above 7", coming closer to 7.25"
Measurements below are for the original gear. These chains appeared to fit 2 of the GG33A21-36 gears we have available in a different listing near perfectly.:
Comes with a 30-day guarantee if these don't work for your needs!
| Part Number | 31GCF-70-E |
| Type | GEAR DRIVE CHAINS |
| Material | Polyurethane |
| Circular Pitch | 0.1 |
| Length | 7 |
| Belt Width | 2031/10000 |
| Mating Pulley/Sprocket | 31A and 31B Series |
| Belt Thickness | 0.203125 |
| Ultimate Tensile Strength | 30 lbs |
| Operating Load | 8 lbs |
| Operating Speed | 376 feet/min |
| Operating Temperature | +180°F to -15°F |