1) Features

   Black colored durable aluminum aperture (5/16” diameter)

   8-32 thread size fits most recurve sight and 10-32 thread size fits

   the Cartel Activa carbon or the Spectra sight and most compound sights.

   CR303 has 3 different types for the archer preference as follow:

           A type: 2way tunnel housing with brightly colored fiber optic dot

           B type: 4way tunnel housing with brightly colored fiber optic dot

          C type: 2way tunnel hosing with a central hole to fit flu pin.