Pitney Bowes DM300M & DM400M Franking Ink & Labels

The Pitney Bowes DM300M and DM400M use the same blue, Mailmark-approved franking ink cartridge and the same franking labels, so every ink and label on this page fits both machines. All of it is Royal Mail approved and will not void your machine warranty.

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Ink for the DM300M & DM400M

Choose from genuine original or compatible ink, both printing the same approved Mailmark blue. We also offer an ink refill and reset service.

Labels for the DM300M & DM400M

These machines take double-sheet franking labels in standard 150mm, long 175mm and extra long 215mm sizes, plus individual single-cut 156mm labels. Choose the format and pack size that suit how much you post.

Why buy from Mailcoms

Mailcoms is a Royal Mail Authorised Inspector and has been trading since 2005. We are one of only two companies in the UK with our own brand of franking ink approved by Royal Mail. Standard UK delivery is 3-5 working days and free over £40, with a next working day option available.

Frequently asked questions

Which ink cartridge does the Pitney Bowes DM300M use?

The DM300M and DM400M use a blue, Mailmark-approved franking ink cartridge, available as genuine original or compatible. Both print the same approved blue.

Is the DM300M and DM400M ink the same?

Yes. The DM300M and DM400M share the same cartridge and labels, so anything on this page works for both.

Which labels fit the DM300M and DM400M?

They use double-sheet labels in 150mm, 175mm and 215mm, plus single-cut 156mm labels.

How fast is delivery?

Standard UK delivery is 3-5 working days and free on orders over £40, with a next working day option available.