Feed grade limestone import to Bangladesh

We have a very close customer. They are regularly buying from us live and killed vaccine for their day old chicks,
HISEX day old chicks origin The Netherlands. Vitamin premix, disinfectant and many more.
They have very big feed mills and importing Lime Stone 2-3 mm & 3-4 mm , grey color.
Purity:85-90% min. Minimum order quantity : 1000 Tons above, bulk in container.
They are looking for alternative very reputable and genuine suppliers.