What is the required dimension for conveyor roller selection?

1. We can provide standard roller suitable for belt widths of between 400mm and 2400mm.
1) Belt width: 400mm, 500mm, 650mm, 800mm, 1000mm, 1200mm, 1400mm, 1600mm, 1800mm, 2000mm, 2200mm, 2400mm
2) Roller diameter: 63.5mm, 76mm, 89mm, 108mm, 133mm, 159mm, 194mm, 219mm
3) Roller length: 200mm – 2500mm

2. Could you provide the following specification for conveyor roller selection?
1) Shaft Length A __________mm
2) Gauge Length B __________mm
3) Face Length C __________mm
4) Roller Diameter D __________mm
5) Across Flats E __________mm
6) Wall Thickness F __________mm
7) Shaft Diameter G __________mm