... 1.specifications name Roller Blinds Componentsitem no.YZ-005-14Up RodAluminum AlloyDown Rail PVC, Aluminum Alloysize:customized Ball Chain Plastic, MetalBracket plasticRod thickness ... , 70mmUsedRoller blinds, Shangri La blinds, Zebra BlindsUp Rod: 28mm, 38mm, 50mmUnit Control Down Rail: PVC and Aluminum Alloy) 28mm, 38mm, 50mm Up tube of roller blinds