Unidentified MFG - Glass-Two - Polished Glass Rod, 19MM Diameter X 86.7 mm Length
Glass two - Optical Glass Rod.
Rod lenses are highly polished cylinders made of optically transparent and homogeneous materials. Cut-rod cylindrical lenses are derivatives of the mother rod lens obtained by grinding off top and bottom of the rod.
Optical Glass Rod.
Dimensions: 0.749" (19.0mm) round D x 3.414" (86.7mm) long.
Very High Quality.