C3 board backed envelopes are large 115gsm heavy-duty manilla envelopes with hot melt glue on all seams, and finger lift silicon paper strips. Perfect for mailing large A3 documents by adding extra protection of a 550gsm grey board back. Printed on the front of these C3 envelopes in red is 'Please do not bend'.
Size: 457 x 324 mmPlease note: These envelopes are not available as a sample.
|Flap||Peel & Seal|
|Millimeters||457 x 324|
|Inches||17.99 x 12.99|