· 10X13 CATALOG ENVELOPES; Aimoh’s White 10x13 Security Envelopes combine a professional security tint pattern, large size for business documents and premium quality for the best 10x13 envelopes on the market· SECURITY TINT PATTERN; ideal for secure business mailing and sensitive correspondence, each 10x13 envelope contains a super secure, security tint pattern to protect contents, information and data when mailing· WHITE 28LB STOCK; perfect for everyday business use, Aimoh’s 10x13 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear and use high quality, white 28lb stock for a professional finish· SELF ADHESIVE SEAL; Aimoh's 10 x 13 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing thicker catalogues, brochures and magazines· 300 10 X 13 Catalog Envelopes in every pack for a long lasting supply, easy bulk mailing and everyday business correspondence!