When looking for a 50m male-to-male VGA cable (premium), you should consider the following features:

1. **Build Quality**: Look for cables with a sturdy construction, such as gold-plated connectors and shielded cable to reduce interference.

2. **Signal Quality**: Premium cables often have better insulation and conductors that help maintain signal integrity over longer distances.

3. **Compatibility**: Ensure that the cable is compatible with your devices, such as monitors, projectors, or computers.

4. **Flexibility**: Check if the cable is flexible enough for your setup, especially if you need to run it through tight spaces.

5. **Warranty**: A good warranty can indicate quality and give you peace of mind regarding your purchase.

If you have specific brands or features in mind, I can help narrow it down!