This pack contains 2 headers, varifeed 18ft and varifeed 40ft, both of which are from FS15.
The only difference in these headers to the in-game ones is that they can be attached to the FR850 forage harvester (DLC) and Krone Big X1100.
With them attached the forage harvesters can now cut Wheat Barley and Rape, and in turn will produce silage.

New Holland Varifeed 18
Working width: 18ft / 6m
Fruit Types: Wheat Barley Rape
Suitable for: FR850 / BigX1100
Cost: 32,000
Maintenance: 30/day
Working Speed: 15kph / 10mph

New Holland Varifeed 41
Working width: 40ft / 12.5m
Fruit Types: Wheat Barley Rape
Suitable for: FR850 / BigX1100
Cost: 65,000
Maintenance: 90/day
Working Speed: 10kph / 6mph