About the Kun Standard 4/4 Violin Shoulder Rest:
 
The practical, uncomplicated design of the Kun Original shoulder rest, with its simple adjusting mechanisms has made it the favourite of amateur and professional players alike.
 
A note on the Kun Original: the T-shaped feet on this model should not be removed to make the rest fit into your instrument case. Regularly pulling the foot and round drum out of the L-shaped end member and then reinserting it weakens the composite plastic from which the shoulder rest is made and can damage the shoulder rest. If you need a more compact rest,  try the Kun Collapsible or Solo model which fold for easy storage.
 
Also, the Original also can not be modified with Collapsible end members.