... )Thickness: ±5% of wall thicknessc)Length: ± 0.0-4.5mmApplicationconstruction upholstery, decorating lighting fitting piece, fluid pipeline, irregular shape tube, duplexing tubenameSquare ... : ±5% of wall thickness c)Length:0.0-4.5mmApplicationconstruction upholstery,and industry instruments (fencing,railing,safe door/windows,gate fitting ...