Dirt/dust/liquids/contaminants... can ruin a computer keyboard in seconds. Work stops, cold, repairs and downtime are expensive. Viziflex Seels stop trouble in its tracks! Not just a dust cover, Viziflex Seels actually protect keyboards while you type. Easy to use and install; they "fit like a glove". Proven in thousands offices, factories, hospitals, service stations, restaurants... wherever computers and data input devices are used. Viziflex Seels are made of strong, durable, incredibly flexible matte finish polyurethane material. Molded to fit precisely over the keyboard, they provide reliable protection 24 hrs. / day without interfering with the operation in any way. Non-glare finish leaves all keyboard markings clearly visible.