Moog K6203-2 Coil Spring Insulator Moog Problem Solver products incorporate proven design and engineering features. Protects spring and spring seat from damage Replacement helps to reduce noise Moog engineering-validated construction and design Premium materials for long life Quad-lip seal provides maximum contamination protection Precision-matched components deliver smooth and quiet operation Ensures proper ABS function and quiet operation Integral raceway provides proper clearance between the ball and bearing riding surfaces Improved connection and conductivity of the ABS signal due to high strength polymer and copper wiring