Select options Spherical End Caps For Half Round Gutter, Reversible $11.00 – $19.00 Reverse bead Spherical End Caps fit both right and left ends. Installation requires ⅜” screws which are included. Seems are sealed with solder for copper and sealant for aluminum or Galvalume. Available in 5″, 6″ and 8″ sizes in copper and chromated aluminum (must be painted). Installed photo shows installation using pop rivets. View Installation Instructions here.