Steel pipes and tubes importing

I had to see the "small suppliers and resellers" but even so I make a lot of purchases in from different suppliers then resell them in Dakar (the capital).
Straight pipe 80*40
Straight pipe 60*30
Straight tube 50*30
Straight pipe 40*27
Square tube 40
Square tube 35
Square tube 30
Square tube 25
Square tube 20
Square tube 16