Bass G style keg tap, also known as, keg coupler, coupling, or adapter
Fits Anchor Steam kegs.
Will also fit:
Abbot Ale
Anchor Liberty Ale
Anchor Porter
Anchor Steam
Bass Pale Ale
Blackthorne Cider
Caffrey's
Fuller's ESB
Fuller's London Pride
Grolsch
Old Speckeled Hen
Rouge
Scottish Tennents
Sir Perry William's
Watney's
Young's
Young's Chocolate Stout
Young's Oatmeal Stout
Young's Ram Rod Bitter
Young's Special London Ale