... :110,150,200mm 3.Stem:63 mm industrial thermometer glass tube (1)Upper body material: Aluminum cover(2)Surface treatment: polishing ... :-50~600oC or according to customers' requirement.Temperature bellow 300oC,connection material is brass, higher than 300oC,it would be iron ... or ss.(7)Connection:1/2", 3/8",3/4" NBP,BSP, according to ...