Canon MX420 Accessories – we offer 4 of them. Did you know that we offer free shipping on ALL our products? Retrevo has the largest collection of Canon MX420 Printer accessories – choose from 4 MX420 Printer Ink. With guaranteed compatibility and a 30-day return policy, you can shop with confidence. Not looking for Printer accessories for Canon MX420? Retrevo has the largest collection of Canon Printer Accessories.