Tender For supply of flat bottom boiling flask 250 ml for ongc , burette stand with two clamp for ongc , beaker for urea adduction for ongc , soxhlet extraction unit medium for ongc , soxhlet extraction unit large for ongc , glass rods, diameter- 3mm for ongc , glass dropper with rubber bulb for ongc , chromatograph column glass for ongc , chromatograph column glass, outer diameter- 11mm for ongc