Aalam Albehar For Glassing and Pergola Systems Manual sliding door Manual sliding door systems create a feeling of openness and utilize space efficiently. offer an unobstructed view and allow natural light to shine. A comprehensive portfolio of manual sliding door systems to cater for the widely varying demands of home, work and daily life • Smooth and silent operation • Excellent protection against corrosion • Impressive convenience • Freedom of planning • Easy and fast installation • Full protection against weather conditions • Longer service life • Available in one or two doors with multiple sliding functions