PKG (4) 2″ Square Linear Polarized Filter Slide has a 1-3/8” x 15/16” Window.
Amazon.com Price: $8.99 (as of 12/27/2020 20:51 PST- Details)
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Our 2″ square linear polarized filter slide has a 1-3/8” x 15/16” window. Nice for classroom demonstrations and home-schooling use. Made in the USA.