Gels Red+Blue+Green Color Filter Film Soft Paper Fr Studio Light Spotlight 40*50 | eBay
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Neewer 16×20 inches Gel Color Filter, Colored Overlays, Transparent Color Film Plastic Sheets, Correction Gel Light Filter for Photo Studio Strobe Flash, LED Video Light, DJ Light, etc. (Red) | Neewer
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Neewer 4PCS Standard 1.25 inches Color Filter Set for Telescope Eyepiece: Red Yellow Green Blue, Perfect for Lunar and Planetary Observation – neewer.com
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Lightequip Colour Filter 25 x 25 164 Flame Red | MUSIC STORE professional