3.75" Tall when bottomed out.
Move up to adjust flame , Regulator or needle valve required , not provided.
Magnet and (2) 10/24 screw holes provided on bottom for mounting.
 
Blast Shield Bunson Torch Instructions:
 
Use needle valve or appropirate regulator to regulate the gas pressure not a lot of gas preassure is needed to run the Bunson approximatelly 1/2 to 3 pounds, depending on your situation. Vary the oxygen by moving the Bunson barrel up and down and locking the set screw, this will fine tune the flame.  
There is a magnet on the bottom and (2) 10-24 screw holes for mounting the torch.