SSP TurnPro Tube Fitting Gap Gauges ensure that tube fitting are properly tighted up.  The gage is a no-go gage, which means that when the fitting is properly tightened, the gage should not fit between the shoulder of the tube fitting and the fitting nut. 

Features:

• 1/4 to 1 in. size (6 mm to 25 mm)
• 3/4 and 1 in. (16 and 25 mm) sizes measure from both tradition and snug installation guide lines.