Sometimes users want to make long distance line projection in practical use of this green line laser alignment. In such kind of working occasions, users need to adjust the alignment laser to correct targeting distance or direction. In addition, users also need to choose high powered alignment lasers so as to project bright enough green reference line in work. At the same time, line projecting stability is a very important concern in such occasion. When this green laser alignment is being used for long distance line projection, its inner tube might become very hot in continuous line projection. In order to allow it workable in such occasion, this alignment laser is precisely designed with larger size laser tube with diameter of 26mm. It is specially designed with large space for thermal emitting metal heat sink. Whatever kind of working occasions, this industrial alignment laser has just brought users the best line projection result successfully and efficiently.