Check the listing for details. FP Ultimail Sponge Postbase Sponge Moistener. Condition: New. Listed at 9.95 USD. Franco Postalia Sealer Sponge Fits: Ultimail Postbase models with automatic sealer unit Sponge only Measures 2-5/8" x 1-1/4" x 3/8" Compatible part numbers: 510033202500 Ultimail 580052104300 PostBase Moistener Moistening Felt Clean Machine Mailing stocks a large inventory of mailing equipment parts and supplies!We sell parts for: Streamfeeder, Surefeed, Omation, Pitney Bowes, Secap, Astro, Rena, Hasler, Neopost, Formax, Quadient, Maag Mercure, Accufast, Ameritek, MCS, Videojet, Kirk Rudy and more. We have a 60 day standard warranty on all equipment and supplies. Returns are accepted within 14 days. We properly pack each item to avoid shipping damage.