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Contact SupplierTube Length : Workable tube length 200mm.. Shade System : Laurent halfshade device workable on sodium light source. Circular Scale : Graduted scale on glass divided in single degrees 0-360 every 5th line extended and every 10th line numbered combined with sugar scale -0 to30°s and +0 to 110°, mounted in dust proof metal housing. Vernier Least Count : 0.05° Analyser & Polariser : Made of polaroid. Body : One piece alluminium alloy casted body. Pol Tube : Borosil glass thick wall 100mm and 200mm tube with brass holder. Light Source : 35W sodium lamp with transformar, input 220V AC. Plywood packing case, instruction manual, dust cover.