1/2" x 1" x 1/8" Rubber Flat Washers - Multiple Pack Sizes Pack Options: 12, 24, 48, 100 packs Size: ID: 1/2" OD: 1" Thickness: 1/8" Durometer: 60 +/- 5% Features: Premium grade rubber for exterior use Vibration dampers, spacers, springs, or gaskets Supports eners in construction, absorbs vibration, seals fluid connections Shock-absorbing, insulates electric motors Industry Uses: Plumbing, HVAC, pools, boats, aquatic products Insulates against electric charges, absorbs shock in machinery EPDM Rubber: Resists water, oxidation, UV, ozone, aging, and weathering Ideal for sealing applications, temperature and compression versatility."