Canon imageCLASS MF5850dn Basic Operation Manual page 241

Recycling Used Cartridges
■Bundled Return
Bundle multiple cartridge boxes together securely with tape.
Please be sure that the shipment does not exceed UPS specifications (See Below).
Maximum weight = 70 pounds Maximum length = 108 inches
Maximum girth (length + 2 x width + 2 x height) = 130 inches
Please Note:
Do not send defective cartridges for replacement.
Defective cartridges under warranty should be exchanged by an authorized dealer or service facility as
provided in the warranty.
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