Ms darshan singh & sons ( dss a complete house of microscopes)july 1957 present (57 years)ambala cantt, haryana (india) hello sirmadam dss laboratory ware like beakers, burettes, condensers, cylinders, culture tube, flasks conical, flasks round bottom, flasks flat bottom, flasks volumetric, funnels, petri dish, pipettes, measuring cylinder, kipps apparatus, funnels, volumetric flask, spirit lamp, separating funnels, beaker, burettes, pipettes, joints, test tube, crucible, filter flask, reagent bottle, water bath, soxhlet apparatus, .