Search by Manufacturer Part Number, or Manufacturer Name, or Product Description Items In Cart: Subtotal: Blank Letterhead/Env > Stationery Envelopes > Certificate Bond Stationery Envelopes Certificate Bond Stationery EnvelopesOffers a wide selection of discount Certificate Bond. Shop for Stationery Envelopes and receive free shipping on qualified orders. Certificate Bond 8 1/2 x 11 Letterhead 24lb. Recycled 25% Cotton White 2500/Box Stationery, Stationery Letterhead, Item # LTRHD17, 1000 per carton. Please use the search function to find the matching Envelope for this Letterhead Enter Item # ENV17. 1 Box.