Grade 2 Titanium Set includes quick-change screen hand-piece, 14mm titanium mouthpiece/adapter, as well as glass handle for safety and hands-free use when vaping liquids as no screen is needed. Please note that all Ditaniums already come with 14mm titanium mouthpiece/adapter. This is a complete replacement set. Please view our Titanium Hand-piece, Standard with Glass Handle If you want to upgrade your existing hand-piece to a titanium version. The titanium hand-piece improves the performance of our units by allowing greater heat transfer. They also should never be left on the heater for greater than the duration of the pull (30seconds). The quick screen change feature helps to ensure the unit always performs at its optimal by allowing the user to easily change the screens.