Alum Crystal is a leader and responsible in the field of manufacturing and assembling winter closing systems according to planning and architectural requirements. An aluminum and glass enclosure is an ideal solution that allows restaurant and cafe owners to maintain a pleasant and aesthetic environment during the cold winter months. Additional advantages: Maximum utilization of the business space. Preservation of business revenue even during the winter. Significant savings in heating or cooling expenses. Possibility of disassembly, storage and assembly next season.