Patented RCA Silver-Tube™ plugs with 11mm opening for use with reference Eclipse Interconnect, Silver Eclipse Interconnect, Gold Eclipse Interconnect, Silver Starlight Digital Audio and Gold Starlight Digital Audio cables. Set of 2. Aluminum barrels are available with red lettering, or white lettering. Red lettered barrels are standard. If you prefer white, please specify in the "Add Notes" field when you get to the cart. Heat shrink tubing is included.