All-purpose moistener designed for fast processing of envelopes. Easily moistens all sizes of envelopes in one mess-free pass. Separate area specifically made to apply moisture to stamps or fingers. Advanced cellulose wick pulls water up from bottom- stays moist for days. Enclosed housing prevents splashing & protects water supply from evaporation. Moistener Size: 3.75" x 3.75" x 2.25"; Color(s): Black; Material(s): Glycerin.