Quality Park 10x15 clasp envelopes are a staple of every office; a gummed flap and reusable clasp make them ideal for mailing and storage; 100 per boxOur yellow envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeatA deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mailHeavyweight 28 lb kraft paper envelopes are opaque to protect private contents; strong enough for bulk mailing or organizing the officeA great value; large envelopes are an economical way to send manuscripts, certificates or other documents you’d rather mail flatClasp envelope on paper stock features a gummed flap closure.Double prong metal clasps with reinforced eyelets.Heavily gummed flaps. Reusable.