Set of 5 color filters made of clear/ transparent acrylic polymer (Plexiglass color filter). This set includes red, blue, orange, green and yellow filters. Available in two different sizes. Small filters measure 2" x 2" (or 5cm x 5cm) while the large filters measures 4" x 4" (or 10cm x 10cm)and the thickness of 1/8" (or 3mm). Used for physics experiments including the demonstration of color addition and color subtraction. All color filters will be shipped with a protective mask.