... , 31.8 , 33, 35, 36, 38.1 , 40 , 41.8 , 42 , 45, 48 , 50 , 50.8 , 56 , 57 , 60, 63.5 , 76.2 ... , 38*25 , 38*38 , 40*10 , 40*20 , 40*40 , 45*75 , 48*23 , 48*48 , 50*25 , 50*50 , 55*13 , 60*40 , 60*60 , 70*30 , 73 ... *43 , 80*40 , 80*60 , 80*80 , 95 ... ,25*35,25*45,25*50,20*58,30*60,40*75,34*80,20*100,40*96,50*110,31*120e) wall thickness ...