Cylindrical Vibration Isolator, Vibration Isolator Style Two Tapped Holes, Maximum Load Downward Compression 210 lbf, Overall Diameter 1 in, Height 1/2 in, Maximum Load Sideways Shear 30 lbf, Thread Size 1/4 In.-20, Isolator Material Rubber, Mounting Compression, To Abrasion, Stud or Tap Material Grade 5, Yellow Zinc Plated