What is the required dimension for conveyor roller selection

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