These high quality q connect manilla internal envelopes feature a reusable self sealing flap to make sure documents are kept secure during transit they also feature punched holes to show at a glance if theres a document inside and include pre printed boxes for clear addressing to the intended recipient manilla envelopes for internal mail punched holes show if envelope is in use reusable self seal flap printed boxes for addressee dimensions 381x254mm suitable for a4 and larger documents s