Usage：Government agencies, offices, post offices,
Size：Chinese version 15K 100X220mm、12K 120X230mm
Western version 12K 115X227mm
European version 15K 100X220mm、12K 120X227mm
Class：Envelope
Material：Paper
Price：Please contact us
Description：Window envelopes (a hole cut in the front side)
Note：Double-sided adhesive or gum can be applied at the envelope seal