Cord driven spring roller blinds 1High quality fabric for choosing 2 bracket,clutch,end plug 3 Spring pressurized oil system Cord driven spring roller blinds Stop at any position when rolling up the blind.Draw the chain or pull the lower. Oil brake system makes the roller blind work smoothly and quitely. Use the sunshine fabric or blackout fabric,weight around 500g/mĀ²Use the ordinary light fabirc ...