Dutt & Co.
11/A, B. T. Road
Kolkata- 700056, West Bengal (India)
Bihar Refractories India
No. 1B, Jabakusum, 2nd Floor No. 34, Chittaranjan Avenue
Kolkata- 700012, West Bengal (India)
Global Enterprise
No. 15-B, Clive Row Dalhousie
Kolkata- 700001, West Bengal (India)
Minerex
No. 5, Kailash Saha Lane
Kolkata- 700007, West Bengal (India)
SRK Enterprises
No. 10, Sarat Bose Road
Kolkata- , West Bengal (India)