Columbian CO131 (#10) 4-1/8x9-1/2-Inch Inkjet/Laser White Envelopes, 100 Count Envelope is specially designed to be used in both inkjet and laser printers. Premium 24lb stock minimizes smearing from inkjet printers. Heat resistant adhesive seal minimizes tacking from laser printers. Security tinted for added privacy and confidentiality. Executive Style diagonal seam V-flap construction. Moisture activated gummed seal. (#10) 4-1/8" x 9-1/2" 100 envelopes