rings for Binoculars that allow you to glue solar eclipse filter film to.
Tasco 10 x 50 has 62mm inner diameter
Focal 8 x35 has 50mm inner diameter
Tasco 7 x 35 has 47mm inner diameter
Nikon glass filter has a 63 inner diamter and is for use with SHADE 14 Welders glass 2 X 4.25

I used Solar Filter Sheet for Telescopes, Binoculars and Camers from Thousdand Oaks Optical