A reusable, ringless ring for pressable ceramics. Made from a soft, flexible rubber material so the plunger reservoir will not wear like other rings, guaranteeing a good plunger fit even after many uses. The blue-colored top of the ring keeps the investment level as well as keeping the investment at a consistent height. Also, this ring does not leave a seam in the investment like paper rings. This is the large size ring (200g). Made in the USA.