Preferred Postage Supplies Four Pints (64 Oz Total) Sealing Solution Compare to Pitney Bowes E-Z Seal 601-0 4 Pints of Preferred Postage Supplies Sealing Solution Ready to Use! No messy mixing or residue in machines like other "Add Water Products" For all DM Series Mailing Systems Compare to Pitney Bowes #601-0 We use de-ionization to filter all impurities