Kettler frame type of tubes
 

Hi guys,does anyone know something about tubes that Kettler used for making their frames? I know that Kettler was one of the first manufactures, that has produced alu frames, but i can not find anywhere, which type of tubes did they use? I am thinking to buy one of their models: Kettler alu rad Safari edition from 1988' (see pic). Any info will mean a lot! Thanks in advance!
https://cimg4.ibsrv.net/gimg/bikefor...7de11e187.jpeg

I've seen several but none that weren't silver/aluminum colored. Tubing info should be available.

https://cimg1.ibsrv.net/gimg/bikefor...a07f533ddc.jpg
No information about the used alu here.
https://cimg6.ibsrv.net/gimg/bikefor...4ea7a0dd00.jpg

fabiofarelli that is my problem also. I can not find nowhere info about tubes. Everywhere is just info that frames are made of aluminum.

On the Kettler website, in section "History", there is info that Kettler was the first one that used aluminum for building frames. Maybe it is true, but it is unbelievable that info about tubes does not exist anywhere, and not just for this Safari Edition model...