The National Scientific Suppliers
No. 4, Periyar Road, Ayanavaram, Near Nadar School
Chennai- 600023, Tamil Nadu (India)
Tneb Limited
Npkrr Maaligai, 144, Anna Salai
Chennai- 600002, Tamil Nadu (India)
Veta Corporation
No. 9, Madley Road, T. Nagar
Chennai- 600017, Tamil Nadu (India)