The Triumph Dual Weapon Turrets consists of two eight (8) piece turrets.  The turret has a 0.8 inches (18mm)  mm) mounting ring.  The turret can use any Blood & Skulls Industry Light Weapon Sets and the weapon mount is pre-drilled for 1/8 inch diameter by 1/16 inch magnets.  It is compatiable with Games Workshop Rhino plastic model.