9 x 12 Heavyweight 28 lb. Brown Kraft Clasp Envelopes Excellent Solution for Accessible Storage or Filing. Whatever your home or office needs are clasp envelopes can make staying organized easier! Great for projects filing and mailing Quality Park s heavy-duty double prong clasp and reinforced eyelets are durable for repeated use. Envelopes are made of 28 lb. brown Kraft stock that is great for extensive handling as well as mailing. Contents are protected during use to give you assurance that it arrives unharmed. When folding is undesired these envelopes are the right choice - the 9 x 12 size will accommodate most documents. Heavy gumming keeps envelopes securely and permanently sealed when needed. Purchasing envelopes will be at a minimum with the convenient 100 count giving you more time to concentrate on business. Let Quality Park be your envelope source! See our array of other envelope options to fit your business s needs!