... loosing direction, together with support plat to drive the roller tube running and drive the fabric remove up and down. Chain ... -deforming, exquisite appearance etc. Roller Blinds System Clutch: 38mm Aluminum Tube Fabric: ( 1%,3%,5%,10% 15% Openness in polyester & ... chute, clutch, chain, code, bottom rail, fabric etc. The aluminum alloy tube is 28mm or 38mm diameter with the anodic oxidation treatment ...