Ashika Commercial Pvt. Ltd. Supplies Hour Glass Anti Vibration and Suspension Spring. Ashika Commercial Pvt. Ltd. Manufactures air springs for railway rolling stock, precision engineering machine components. Hour Glass Anti Vibration and Suspension Spring is a patented design which is suitable for both primary and secondary suspension of heavy vehicles. Hour Glass Anti Vibration and Suspension Spring provide large horizontal deflections for bogie rotation, and lateral displacement. A half unit can be used with an air spring assembly for excellent vertical and horizontal stiffness characteristics in normal and emergency conditions.