Profile: Rainbow Springs Manufacturer produces industrial springs products. Conical compression springs offer relatively constant spring rates and are characterized by a shorter block length than cylindrical wound compression springs. Tension springs are a simple, mechanical, and inexpensive solution for all uncontrolled closing and return movements. Extension springs store and transfer forces by pulling the spring ends apart. The force is introduced via the eyelets or connection elements and the stored energy is partially released again when the spring is pulled together. We also manufacture custom springs with the appropriate spring ends for screw-in part. Tapered spring's design changes towards the end and becomes larger or smaller. They are mainly used when the installation space is limited in the axial direction.