Feature ： Matrix Ring- Blue/Orange/Green Small-blueApplication: premolars/low crowns Medium-orangeApplication: molar/high crown Big wide-green Application: large area defect,missing axis angle Titanium Alloy Standard/Narrow Ring Available Size Narrow, 18.6(±0.2） Standard,19.2(±0.2） Clamping Ring for split teeth. Split teeth without impact. Matrix Ring – Short/Tall/Wide The two main separator rings, short (blue) and tall (orange).These are your “go-to” rings and will be used for the majority of restorations. The short ring is mainly used for bicuspids, premolars, pedo, malpositioned teeth; any tooth with a short crown. The tall ring is used for typical molars, taller teeth, or stacking over blue for MODs. The Wide Prep ring greatly simplifies what until now has been one of the most challenging posterior composite restorations. Now you can restore extremely wide preps and missing cusps with confidence knowing that you will achieve excellent contact and contour without having to take extra steps. Get a grip – Separator rings incorporate retention extensions that anchor them securely to virtually any tooth. Fusion rings stay where you place them! Stack it up – Allows placement of the orange ring (tall) over the blue ring (short) for easier MOD and multiple tooth restorations Hugs the curves – Silicone tips with enhanced marginal ridge anatomy hug the R8 Titanium Alloy Child Ring Height: 4.8mm/0.19in Use: Suitable for primary teeth and young permanent teeth. 1. The ring body is made of super elastic nickel titanium alloy, with moderate strength, softness, and deformability, which can well meet the stability and adaptability requirements of the clamping ring for primary and mixed dentition. 2. The bottom corner of the head can extend into the concave area of the neck of the primary teeth, ensuring stable and non-slipping,improving the safety of use. 3. The contact area of the head is made of elastic silicone, which has good adaptability to the shape of the tooth and good adhesion,an quickly and convenientrestore the shape of primary teeth. 4. It has good separation force and can easily achieve close contact betweenadjacent surfaces. FDA Statement:The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If so, do not bid on this item unless you are an authorized purchaser. If the item is subject to FDA regulation, I will verify your status as an authorized purchaser of this item before shipping of the item