Product specifications:

A double outer 18*1.5 Big Head

B copper outer 14*1.5 Outer 18*1.5 big and small head

C copper outer 14*1.5 copper inner 14*1.5 small head

D copper outer 14*1.5 copper inner 14*1.5 Outer 18*1.5 Large and Small Head

E copper outer 18*1.5 Outer 18*1.5 Big Head