Material purpose: use 25mm Aluminium horizontal venetian blinds steel bottom rail  
Color: default color
Metal : Steel with coating
size: 20.5mm width * 10mm hight * 0.4mm thickness 
Packaging: 100pcs per master carton.

20mm c shape steel bottom rail





Aluminium blinds with curve steel head rail






Curve steel head rail end cover



Making curve steel head rail on machine




Head rail and bottom rail making machines