Prime-Line Products U 9896 Door Viewer, 130-Degree, Big Eye, 1-Inch Bore, Brass
Amazon Price: $12.59 ($3.93 / oz) (as of September 18, 2020 9:39 pm –
This viewer features a threaded diecast housing and solid brass constructed end caps. It fits on 1-1/2 in. to 2-1/8 in. thick wood or metal doors. It has a bore size of 1 in. and also features glass lenses.