The IPS Investment Ring System is available in three sizes. It is composed of a grey ring gauge and a ring base and is used to sprue the contoured restorations. The 100 g and 200 g investment rings are used for IPS e.max Press,1 IPS e.max ZirPress and IPS InLine PoM; the 300 g investment ring is used only for IPS e.max ZirPress and IPS InLine PoM.
