Dear Customer: 
 Hello! ! The following is a cap foot-related matters with the description: 

 Name: hat foot, also known as inner diameter of foot, the amount of the cap device. 
 Type: There are three: one is the large cap feet, one is in the cap scale, a bonnet-foot 
 Measurement Range: (Large) 55-68 () 49-62cm (small) 42-52cm 
 Build material: stainless steel, copper. 
 Usage Notes: 
 1 Do not store near pH substances. 
 2, do not wash, try to avoid contact with the liquid. 
 Do not let the other items squeeze gently. 
 4, the error should be minor adjustments to the two screws on the pointer. 
 Measuring cap, the ruler put in the hat, the light expand the natural measure, should not be excessive force. 

 Note: Whether it is even the best quality machinery and dedicated accessories tools to use basis having the right to use. At the same time to learn to correct maintenance or storage method. So in order to ensure long life.