Cylindrical Vibration Isolator, Vibration Isolator Style Two Threaded Studs, Maximum Load Downward Compression 185 lbf, Overall Diameter 1.5 in, Height 1 in, Maximum Load Sideways Shear 45 lbf, Thread Size 5/16 In.-18, Isolator Material Rubber, Mounting Compression, To Abrasion, Stud or Tap Material Clear Zinc Plated, Grade 5