Tyvek Envelopes - Heavy Duty Professional Shipping Mailer w/Rip-Resistant DuPont Tyvek Construction & Easy Self Seal Closure - White - Bulk Pack of 20-9x12

HEAVY DUTY ENVELOPES - Classic White Mailers Are Perfect for Sending Documents, Invoices, Checks & Other Office Correspondence; Box of 20 Sheets. INDESTRUCTIBLE DUPONT DESIGN - Lightweight But Strong, Durable Tyvek Material Resists Ripping, Tearing, Punctures, Rain, Moisture & Other Common Postal Threats. CONVENIENT SELF SEAL CLOSURE - Peel Back the Sticker to Quickly & Effortlessly Seal & Send; Open End Catalog Orientation Enables Fast Paper & Packet Stuffing. SUPERIOR SHIPPING PROTECTION - Double Reinforced Construction, Opaque Color & Super Sticky Glue Offers Maximum Security for Confidential Business Mail. BUY CHECKOMATIC & SAVE BIG - Stock Up on Bulk Supplies & Enjoy the Best Prices in the Industry; Envelope Packs Available in 6x9, 9x12, 10x13, 10x15 & 12 x 15 1/5 .