Surely Having Heard The Word “Crystal” or “Glass”, You Immedly Imagine in Youd Any Fragile Objects that You Need to Handle Carefull So AS AS NOT TO TO BREAK. TheFore, MANY RUSSIANS Relate to GLASS DOORS WITH DISTRUST, BELIEVING THAT THE DOORS SHOULD Be MADE FROM MORE DUREBLE MATERIALS. BUT THEAR VERY MISTAKEN, BeCause than Modern Equipment and the Latest Technologies, Manaufacturers Managed to Create a Very Strong Glass Door Leaf, Which Cannot Bee Damage By A Regular Blow with A Hand. You need to try hard to brreak such a glass door.