Kodak 5½-inch diameter No. 13 (amber) safelight filter as specified for certain Kodak Panalure, Ektacolor, Professional, and panchromatic B&W papers. Please refer to the product data sheet packed with the material you are using to confirm that this is the recommended safelight filter for that specific material.
These filters fit Kodak Model A and Model B ("bullet" or "beehive" style) safelights. The filters are used and will have minor marks from previous use, but are in excellent condition, including the rubber seal. Supplied with a copy of the Kodak Safelight Filters data sheet, which includes instructions for safelight testing.
NOTE: No safelight filter is 100% safe for an indefinite period! Always perform a safelight test with the materials you're using to determine the maximum exposure before fogging begins to occur. For information on how to conduct safelight testing, click here.