Flat top, bevelled edge quartz banger with integrated rest to support an enail coil handle.  25mm OD.  These pieces can be used on their own or with a 25mm open enail coil.   Each piece features 3mm walls, a 4mm base, a precise bevel over the top of the bucket and an integrated post/rest welded onto the arm of the banger to support a coil handle.  The thick base retains heat longer than the cheaper bangers while the bevelled edge ensures a good seal with your carb cap (especially well made ball caps).