Office Supplies › Supremex Security Envelope - Security - #10 - 9 1/2" (241.30 mm) Width x 4 1/8" (104.78 mm) Length Diameter - 24 lb (10886.22 g) - 500 Box Image 1 of 1 Supremex Security Envelope - Security - #10 - 9 1/2" (241.30 mm) Width x 4 1/8" (104.78 mm) Length Diameter - 24 lb (10886.22 g) - 500 Box $134.89 Quantity: Add To Cart Added! Open side, tinted interior. 24lb. Box of 500. FSC" certified. SKU: SPX579581 Open side, tinted interior. 24lb. Box of 500. FSC" certified. SKU: SPX579581