... Borosilicate 3.3 glassOuter tube diameter and thicknessφ=47 ±0.7mm =1.6mmφ= 58 ±0.7mm =1.6mmφ=70 ±0.7mm =2 ... .0mmInner tube diameter and thicknessφ=37 ±0.7mm =1.6mmφ=47 ±0 ... .7mm =1.6mmφ=58 ±0.7mm =1.6mmTube length 1200,1500,1600,1700,1800,2000,2100mmCoating CU/SS ...