#20YearsStrong #RetractableRoofSprings #AstroBaseballStadium In this project, the project manager needed a specialized spring that would compress when the wheels met a high spot on the rail. The Uni-Systems design team, along with engineers at Kastalon Polyurethane Products, selected a specialized Kastalon Polyurethane to make the elastomeric springs. With the planned two-decade lifespan now almost upon us, we are bringing out the plans and molds again! Thank you for this repeat business and we’re proud of the success behind Kastalon Polyurethane Spring Systems. If you need a non-metalic, or partial metallic/elastomeric spring system, call on Kastalon today!