we are designer, manufacturer & exporter of all types of helical coil springs for railway bogie & wagon, machineries, automobiles, steel plants, cement plants, chemical plants and other engineering purpose. production capacity : bar / wire dia. - upto 70 mm. outer dia. - upto 500 mm. free height / length - upto 1000 mm. total / active / effective coils - as per drawing or data. load capacity - upto 40 tones (approx.). painting / coating : synthetic enamel paint, powder coating, plascoat, phosphate, zinc coating etc. available rawmaterials : spring steels - en-42, en-45, en-47, 50cr.v4, 50cr.4v2, 51cr.v4, 50cr.mov4, 50si7, 55si7, 60si7, sup-9, sup-9a, sae-5160, is:4454 part-1 grade-2, is:4454 part-1 grade-2d, stainless steel etc. and other foreign grades. contact - www.royal-spring.com