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Envelopes
 | 40-224 - Extra large self-seal double window envelope A large size self-seal double window envelope with blue security tint, used when inserting the entire check without tearing off either stub. Not for use with checks on top. |  |
 | 40-338 - Self-seal security double window check envelope Protect your checks with our self-sealing security envelopes. The perforations on the flap will reveal if the envelope has been opened. | |
 | 44-005 - Double window check envelope Matching double window check envelope. Regular seal with blue security tint. | |