Product Code :KF3455 Manufacturer Code : 3455. Q-Connect DL Window Envelopes 80gsm Self Seal White (Pack of 1000) KF3455.Ideal for everyday use, these Q-Connect envelopes are made from 80gsm white paper and feature an easy to use, secure self seal closure and convenient address window measuring 35 x 89mm. The DL envelopes are suitable for an A4 sheet folded twice or an A5 sheet folded once. This pack contains 1,000 white wallet envelopes.