Isolate It!: Sorbothane Male/Female Vibration Stud Mount - 1/4-20 - 1" (H) - 1 1/2" (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: 11-18 lbs per mount