Elco insert boxes for optimal protection. Protect your documents with this gray protective box. Thanks to the high quality of 550 g/m², your documents and papers are optimally protected during mailing or transport. Despite the high thickness, the box remains almost weightless with a material thickness of 0.8 mm, saving space and not unnecessarily weighing down your envelopes. Material thickness: 0.8 mm. Size: 220 x 315 mm. Weight: 550 g/m². Pack: 100 pieces.