supply of ,supply of hydrometer with following specification 1) range: 1100-1300 specific gravity at 27 degree celcius. 2) l east count: 0.005.3) accuracy: +/- 0.005. 4) length of glass barrel: 260 +/- 2mm. 5) diameter of glass barrel: 22 mm +/- 0.05mm. 6) length of float: 180mm +/- 10mm complete with rubber bulb and rubber nozzle. make: thomson txb or exactly similar specif ication from bell stone. or bew. note: calibration certificate traceable to nabl is required with supply make/brand: bellstone (war ranty period: upto 30 months from the date of sypply) [ warranty period: 30 months after the date of delivery ]