100 DL envelopes (Southdown AL5)

DL envelopes measure 220 x110mm and are commonly used for business correspondence for mail shots because they can fold into three equal parts. But, equally, can be used as plain envelopes with window blanked.

These are in packs of 100. This is new/old stock though the self-seal has dried but gum like Pritt Stick can be used to seal.