| Diameter | Lines |
| mm | n° |
| 8 | 9 |
| 9.53 | 16 |
| 10 | 12 |
| 12 | 12 |
| 12.68 | 16 |
| 14 | 14 |
| 15 | 18 |
| 16 | 16 |
| 18 | 18 |
| 20 | 20 |
| 20 | 25 |
| 25 | 25 |
| 30 | 30 |
| 30 | 34 |
| 35 | 42 |
| 40 | 40 |
| 40 | 48 |
| 45 | 45 |
| 50 | 60 |
(S) Thickness from 1.0 to 2 mm
The lined tube is characterised by a completely smooth internal surface and an external surface signed by grooves along the length of the tube which form small petal-shaped semicircles around the rim of the tube.
The diameter indicates the maximum external measurement of the tube, or rather the measurement between two opposite petal-shapes while the number of lines indicates the number of grooves at the rim.
The wide lined tube has bigger petal-shapes, compared to the narrow lined tube, and the number of lines is practically identical to the double of the diameter expressed in millimetres.
Our tubes are proposed in commercial length, approximately in a range between 4.500 mm 5.500 mm. However, they can be cut in a fixed length, e.g. bars of 5.000 mm, or proposed already cut to pieces in the required sizes, i.e. rings of 30 mm.
The packaging can be arranged on request in bundles protected by bubble wrap or in wooden crates.
To know the minimum producible quantity and to agree on the conditions of return please contact our offices.
To know what commercial measures are immediately availables see the warehouse catalog at our subsidiary Comet SpA warehouse