Ultra-Lightweight for Reduced Unsprung Mass -- Maximum Deflection in Combination with Smallest Block Heights -- Exceptional Block Resistance and Durability -- Precision Planparallel and Square End Configurations Under Unloaded and Loaded Conditions -- Lowest Side Loads with Load Center Ideally Located Relative to Spring Axis -- Precision Tolerances -- Highest Linearity and Guaranteed Rate Consistency -- Each Spring Individually Tested and Rated