Mounted Color Filters, 50x50mm - Red, Blue, Green, Indigo, Magento, and Yellow

Mounted color filters for opitcal boxes or other physics experiments Red, Blue, Green, Indigo, Magento, and Yellow 50mm x 50mm A set of three primary and three secondary acetate filters suitable for use in optical boxes, etc. and mounted in plastic frames of 50 x 50 mm