PAC-DENT 31 Prophy Paste Rings 6 x Plastic Rings Per Pack Go to amazon.com Related posts Which is the best denture cleaner paste? FeatureProphy paste plastic ringAutoclavable (up to 275F) plastic ring.Plastic prophy paste ring fits all 2 gm prophy paste cups. DescriptionPastic Prophy paste ring, autoclavable (up to 275F).