Sectional Matrix System - Ring Refill, NARROW 2/Pk. Nickel-titanium ring composition for spring strength and memory retention. Refill your Palodent Plus Style Sectional Matrix System with this Narrow, Dark Blue Ring Refill pack 10128 These replacement rings are essential for achieving tight contacts and proper anatomical contours when placing composite restorations. Made from durable materials like stainless steel or titanium, these rings guarantee longevity and resistance to deformation.With an easy placement and removal design, these ring refills enhance efficiency and workflow during restorative procedures. Sold in packs of 2, these refill rings provide an economical and convenient solution for replenishing your sectional matrix system. Autoclavable for safe sterilization and reuse, these ring refills are a must-have for any dental professional.