Product Code :KF3409 Manufacturer Code : 721204. Q-Connect DL Envelopes High Window 70gsm Gummed Manilla (Pack of 1000) 721204.Ideal for everyday use, these Q-Connect envelopes are made from 70gsm paper with a gummed flap and convenient address window measuring 39 x 93mm. The DL envelopes are suitable for an A4 sheet folded twice or an A5 sheet folded once. This pack contains 1,000 manilla wallet envelopes.