They are available now in diameter 1.0mm to 8.0mm and length of either 600mm or 1000mm. Only 2.0mm and 2.5mm carbon rods are available also in 1200mm.

The carbon tubes are available in the following sizes (outer x inner diameter x length):

4.0 x 2.5 x 750mm
5.5 x 3.5 x 750mm
5.0 x 3.0 x 1000mm
5.0 x 3.0 x 750mm
6.0 x 4.0 x 1000mm
6.0 x 4.0 x 750mm
8.0 x 6.0 x 1000mm
8.0 x 6.0 x 750mm