3M Crowns Brand Dental Crowns Supplies, Recorder Code 907016 Unitek Stainless Steel Primary Anterior Crown, Upper Right Central, Size 6, 5/box These prefabricated stainless steel crowns with the proven successful clinical use of short- or long-term pediatric anterior and posterior use. The esthetics and biocompatibility of 3M Espe Lava Restorations represent the optimum in all-ceramic restorations. Size 6 5 per box