Kardex Alpha Labels. Kardex PSF139 Alphabetic Labels.  Size 1-1/4 x 1-1/2 scored & laminated, Kardex Alpha Labels are Packed 500 Labels per Box. Kardex PSF-139 Series Alpha Labels are made from high quality, white gloss material with clear lamination for protection. The Kardex PSF-139 Labels are scored so they easily wrap around the edge of your filing product. They have a tackified acrylic permanent adhesive to insure the labels adhere to your folders or jackets.