Thanks! that did the trick and i learned something in the process about tiny geometry!

@unknownuser said: thx, but I found that one only making round tubes, not square ones I need for my windows. Didier Bur Lines to tubes Plugin make also square tube! Just change number segments' section! So Precision = 4! And if you want Toblerone's boxes enter Precision = 3! [image: EBKg_GIF_tube.gif]