Even with a length of 1 m, there was no warpage and it was straight, and it became smooth by exchanging. Also, the diameter was 0.5 mm as wide as the original, and the rattling disappeared.
There are also people who seem to be ordinary scrapes, but they could be used with confidence.
Thank you for the quick delivery. In other words, I think that it is still better if you can order an order with a specified length. This time I cut it to the necessary length here and used it.