10 business envelopes with self seal closure for convenience in standard business mailings Your business is too important to leave the details up to chance. What are your needs when it comes to envelopes Quality, convenience, privacy Redi-Seal closure requires no moisture, extends shelf life and provides a secure seal. 24-lb bright white stock gives mailings a professional look. Seam Type: Side Flap Type: Commercial Trade Size: 10 Security Tinted: Yes.