SF-30 (CP) Screws & Fasteners Silicone Mount, Vibration Insulator with EPDM (Rubber-Coated), Chrome Plated, 100 to 140 Optimum Load (kg/4 Points), 8 to 9 Resonance Point (Hz), 18 to 19 Resonance Magnification (dB), 13 Hz Recommended Frequency, SF Series