— Moistens and seals envelopes in one simple pass. No more licking and hand-sealing envelopes. Easy-fill top access reservoir. Enclosed housing prevents splashing and protects water supply from evaporation. Accommodates most envelope sizes. Moistener Size: 8 1/4″ x 4 1/5″ x 4 3/16″; Color(s): Charcoal; Material(s): Plastic.