... 3.simple.light,even, tender 50(h) series aclinic open window features:1.different colors can be selected2.good sealability3 ... .window frame durable. erosion resisitant,aging resistant, anti-color fadingSPECIFICATION1. ... material type: aluminium alloy2.model number:50A-058,50A-062,50A-060,50A-061,50A-059,50A-0413 ...