Size #3 Rubber Plug Tapered Stoppers. Sold in Lots of x12, buy more and SAVE (Volume Pricing)!  2 Shipping options to suit your needs.
Information from their website:
  • Size #3 rubber stoppers - 12 pack - Black color - General use hardware stoppers 
  • Dimensions: 24mm (top) x 18mm (bottom) x 25mm (length) - Approx. 15/16" x 3/4" x 1" 
  • Solid natural rubber stoppers - No hole - Smooth, tapered sides for excellent sealing and tight fit 
  • Great for plugging containers, stopping pipes, leaks, or using as equipment airflow spacers 
  • Durometer hardness: Shore 65A

  • Pictures are of the actual item you will receive. From smoke FREE and Covid FREE home!  More information or pictures available upon request.
  • I ship quick & green!  I repurpose shipping materials as much as possible, from the packaging to the paper I use to print postage.  This reduces waste and keeps total cost of items down for my buyers.