Inserts are used for low-temperature dabs that cook the oil inside the inserts and keeping the banger from getting dirty 

Small - 13mm size fit perfectly on AFM Flat Top Bell-Bottom Banger

Big - 18mm size fit perfectly on AFM Bell-Bottom 

Pearls - quartz ball spins around the banger

White insert - 18mm size - White bottom quartz 

Reactor - add more heat to your banger 

Peak Insert - for use with the Puffco Peak