Hasler Ink Head for Hasler WJPRO.
Genuine Hasler fluorescent blue ink meets USPS guidelines. This high capacity inkjet cartridge provides clear, crisp printing, is easy to install and requires no messy re-inking.
To ensure clear, crisp imprints, the printhead must be replaced every 2-3 ink reservoirs with a maximum of 1,000,000 impressions or 12 months.