... superior quality of curtain wall glass 2.CCC certificate, conform to EN1279 BS5713 ASTM E546 standards 3.Combining aesthetics, high performance ... silver, U-value can be lower to 0.8-1.7 5.Various SC value to suit all regions, low G-value ... between two pieces, strengthened by steel strips,which ensures products safety. Avoid to bring unnecessary troubles to our customers