pressure tube side: -1/4 bar @ 170 degrees C (volume 23 liter), pressure shell side: 4 bar @ -17/40 degrees C (volume 82 liter) outside diameter:19,5mm x 3404mm length, wall thickness: 0,04mm with (2) glass lined steel heads, first head: manufactured by DeDietrich, serial number 27028, pressure -1/4 bar @ 170 degrees C (volume 9 liter), second head: manufactured by DeDietrich, serial number 27029, pressure -1/4 bar @ 170 degrees C (volume 9 liter)