1 1/2" ID EPDM Rubber Flat Washers - Multiple Pack Sizes Size: Inner Diameter: 1 1/2" Outer Diameter: 2 1/2" Thickness: 1/16" Material: EPDM Rubber Pack Options: 4, 6, 8, 12, 24 packs Versatile Applications: Ideal for various eners Functions as vibration dampers, spacers, springs, and gaskets Supports threaded eners, especially in construction Durable and Efficient: Absorbs vibrations, seals fluid connections in compressors Shock-absorbing, insulates electric motors Industry Uses: Plumbing, HVAC, pools, boats, and aquatic products Insulates against electric charges, useful in electronic and thermal applications Shock-absorbing for machinery with moving parts"