Isolate It!: Sorbothane Female Vibration Bumper Mount - M6 - 21.6mm (H) - 44.5mm (Dia) 50 Duro - 4 Pieces Superior grade anti-vibration mount Made with high quality fasteners and Sorbothane visco-elastic polymer Very low creep rate compared to silcone, rubber, neoprene, etc. Absorbs shock for millions of cycles without the need for metal springs to return material to equilibrium Durometer: 50 (Shore OO) Load Rating: 9-18 kg per mount