Models available : 
 
HED-000-000-00A : Head Type A (picture below)
HED-000-000-000-00K : Keykeg Head
HED-000-000-00L : Head Type L
HED-000-000-00M : Head Type M
HED-000-000-00S : Head Type S
HED-000-000-00U : Head Type U
HED-000-000-TOP : Head Type Vitop