Two small delrin inserts with rivets for installation.  These are used on the Amaruk Ti and Amaruk XD Ti for the connection between the side cage and center frame.
 
The delrin insert protects your cage by creating a "fusable" attachment to the frame, sacrifising itself to preserve your cages sections.  This helps to ensure the longevity of your paramotor!
Small Delrin Insert - for aluminum cages (Set of 2)